/**
 * 싱잉볼 명상 - Main Stylesheet
 * Holistic Wellness Minimalism Design
 */

/* ===== CSS Variables ===== */
:root {
    /* Colors */
    --color-primary: #BCA28B;
    --color-primary-dark: #8B7355;
    --color-primary-light: #D4C4B0;
    --color-secondary: #304860;
    --color-accent: #E9BE79;
    --color-sage: #BCC8BB;
    --color-sand: #F5F3EF;
    --color-white: #FFFFFF;
    --color-black: #1A1A1A;
    --color-gray-100: #F8F8F8;
    --color-gray-200: #EEEEEE;
    --color-gray-300: #DDDDDD;
    --color-gray-400: #AAAAAA;
    --color-gray-500: #888888;
    --color-gray-600: #666666;
    --color-gray-700: #444444;
    --color-error: #DC2626;
    --color-success: #059669;
    --color-warning: #F59E0B;

    /* Typography */
    --font-family: 'Noto Sans KR', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-size-xs: 12px;
    --font-size-sm: 14px;
    --font-size-base: 16px;
    --font-size-lg: 18px;
    --font-size-xl: 20px;
    --font-size-2xl: 24px;
    --font-size-3xl: 32px;
    --font-size-4xl: 40px;
    --font-size-5xl: 48px;

    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-2xl: 48px;
    --spacing-3xl: 64px;

    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.15);

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;

    /* Container */
    --container-max: 1200px;
    --container-narrow: 800px;

    /* Header */
    --header-height: 70px;
}

/* ===== Reset & Base ===== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-gray-700);
    background-color: var(--color-white);
    overflow-x: hidden;
}

a {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-primary);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

ul, ol {
    list-style: none;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

input, textarea, select {
    font-family: inherit;
    font-size: inherit;
}

/* ===== Accessibility ===== */
.skip-link {
    position: absolute;
    top: -100px;
    left: 0;
    background: var(--color-secondary);
    color: var(--color-white);
    padding: var(--spacing-sm) var(--spacing-md);
    z-index: 9999;
}

.skip-link:focus {
    top: 0;
}

/* ===== Layout ===== */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.main-content {
    min-height: calc(100vh - var(--header-height) - 300px);
}

.page-container {
    padding: var(--spacing-2xl) 0;
}

/* ===== Header ===== */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-gray-200);
    z-index: 1000;
}

.header-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo a {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-secondary);
}

.logo-icon {
    display: flex;
}

.main-nav {
    display: none;
}

.nav-list {
    display: flex;
    gap: var(--spacing-lg);
}

.nav-list a {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-gray-600);
    padding: var(--spacing-sm) 0;
    position: relative;
}

.nav-list a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-primary);
    transition: width var(--transition-base);
}

.nav-list a:hover::after {
    width: 100%;
}

.user-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.user-dropdown {
    position: relative;
}

.user-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-full);
    transition: background var(--transition-fast);
}

.user-btn:hover {
    background: var(--color-sand);
}

.user-avatar img {
    width: 32px;
    height: 32px;
    border-radius: 50%;
}

.user-name {
    font-size: var(--font-size-sm);
    font-weight: 500;
}

.dropdown-arrow {
    transition: transform var(--transition-fast);
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    right: 0;
    min-width: 160px;
    background: var(--color-white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all var(--transition-fast);
}

.user-dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-menu a {
    display: block;
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-sm);
    color: var(--color-gray-600);
}

.dropdown-menu a:hover {
    background: var(--color-sand);
    color: var(--color-primary);
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    padding: 0;
}

.hamburger {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.hamburger span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-gray-700);
    transition: all var(--transition-fast);
}

.mobile-nav {
    display: none;
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--color-white);
    padding: var(--spacing-lg);
    overflow-y: auto;
}

.mobile-nav.active {
    display: block;
}

.mobile-nav-list {
    display: flex;
    flex-direction: column;
}

.mobile-nav-list a {
    display: block;
    padding: var(--spacing-md) 0;
    font-size: var(--font-size-lg);
    color: var(--color-gray-700);
    border-bottom: 1px solid var(--color-gray-200);
}

.mobile-nav-list a.highlight {
    color: var(--color-primary);
    font-weight: 600;
}

.mobile-divider {
    height: 1px;
    background: var(--color-gray-300);
    margin: var(--spacing-md) 0;
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: var(--font-size-sm);
    font-weight: 500;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    cursor: pointer;
    border: 2px solid transparent;
}

.btn-primary {
    background: var(--color-primary);
    color: var(--color-white);
}

.btn-primary:hover {
    background: var(--color-primary-dark);
    color: var(--color-white);
}

.btn-outline {
    background: transparent;
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.btn-outline:hover {
    background: var(--color-primary);
    color: var(--color-white);
}

.btn-white {
    background: var(--color-white);
    color: var(--color-primary);
}

.btn-white:hover {
    background: var(--color-sand);
    color: var(--color-primary);
}

.btn-lg {
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: var(--font-size-base);
}

.btn-sm {
    padding: var(--spacing-xs) var(--spacing-md);
    font-size: var(--font-size-xs);
}

.btn-block {
    width: 100%;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* ===== Hero Section with 3D Effects ===== */
.hero-section {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding-top: var(--header-height);
    overflow: hidden;
    perspective: 1000px;
    transform-style: preserve-3d;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, var(--color-sand) 0%, var(--color-white) 50%, var(--color-sage) 100%);
    opacity: 0.5;
}

/* 3D Parallax Layers */
.parallax-layer {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
}

.parallax-layer-1 { transform: translateZ(-300px) scale(1.3); }
.parallax-layer-2 { transform: translateZ(-200px) scale(1.2); }
.parallax-layer-3 { transform: translateZ(-100px) scale(1.1); }

/* Antigravity Container with 3D */
.antigravity-container {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    overflow: hidden;
    transform-style: preserve-3d;
    perspective: 2000px;
}

/* 3D Floating Elements */
.floating-element {
    position: absolute;
    border-radius: 50%;
    transform-style: preserve-3d;
    backface-visibility: hidden;
    will-change: transform;
    animation: float3D 20s infinite ease-in-out;
}

.floating-element.shape-circle {
    background: radial-gradient(circle, var(--color-primary) 0%, transparent 70%);
    box-shadow:
        0 10px 30px rgba(188, 162, 139, 0.3),
        inset 0 -5px 20px rgba(0, 0, 0, 0.1),
        inset 0 5px 20px rgba(255, 255, 255, 0.3);
}

.floating-element.shape-ring {
    border: 2px solid var(--color-accent);
    background: transparent;
    box-shadow:
        0 0 20px rgba(233, 190, 121, 0.4),
        inset 0 0 20px rgba(233, 190, 121, 0.1);
}

.floating-element.shape-wave {
    background: linear-gradient(45deg, var(--color-sage) 0%, transparent 50%);
    box-shadow: 0 10px 40px rgba(188, 200, 187, 0.3);
}

.floating-element.shape-orb {
    background: radial-gradient(circle at 30% 30%,
        rgba(255, 255, 255, 0.8) 0%,
        var(--color-primary-light) 30%,
        var(--color-primary) 60%,
        var(--color-primary-dark) 100%);
    box-shadow:
        0 20px 60px rgba(188, 162, 139, 0.5),
        inset -10px -10px 30px rgba(0, 0, 0, 0.2),
        inset 10px 10px 30px rgba(255, 255, 255, 0.4);
}

.floating-element.shape-crystal {
    background: linear-gradient(135deg,
        rgba(255, 255, 255, 0.9) 0%,
        rgba(233, 190, 121, 0.6) 50%,
        rgba(188, 162, 139, 0.8) 100%);
    clip-path: polygon(50% 0%, 100% 38%, 82% 100%, 18% 100%, 0% 38%);
    border-radius: 0;
    box-shadow: 0 15px 40px rgba(233, 190, 121, 0.4);
}

.floating-element.depth-1 { z-index: 1; filter: blur(0px); }
.floating-element.depth-2 { z-index: 2; filter: blur(0.5px); opacity: 0.8; }
.floating-element.depth-3 { z-index: 3; filter: blur(1px); opacity: 0.6; }
.floating-element.depth-4 { z-index: 4; filter: blur(2px); opacity: 0.4; }

/* 3D Float Animation */
@keyframes float3D {
    0% {
        transform: translateY(100vh) translateZ(0px) rotateX(0deg) rotateY(0deg) rotateZ(0deg);
    }
    25% {
        transform: translateY(50vh) translateZ(100px) rotateX(90deg) rotateY(45deg) rotateZ(45deg);
    }
    50% {
        transform: translateY(-50px) translateZ(50px) rotateX(180deg) rotateY(90deg) rotateZ(90deg);
    }
    75% {
        transform: translateY(25vh) translateZ(-50px) rotateX(270deg) rotateY(135deg) rotateZ(135deg);
    }
    100% {
        transform: translateY(100vh) translateZ(0px) rotateX(360deg) rotateY(180deg) rotateZ(180deg);
    }
}

/* Gentle Float for certain elements */
@keyframes floatGentle {
    0%, 100% {
        transform: translateY(0) translateZ(0) rotateY(0deg);
    }
    25% {
        transform: translateY(-30px) translateZ(20px) rotateY(5deg);
    }
    50% {
        transform: translateY(-50px) translateZ(40px) rotateY(0deg);
    }
    75% {
        transform: translateY(-20px) translateZ(10px) rotateY(-5deg);
    }
}

/* Spiral Float Animation */
@keyframes floatSpiral {
    0% {
        transform: translateY(100vh) translateX(0) translateZ(0) rotate(0deg);
    }
    100% {
        transform: translateY(-100px) translateX(calc(sin(var(--spiral-offset)) * 100px)) translateZ(100px) rotate(720deg);
    }
}

/* Pulse Glow Effect */
@keyframes pulseGlow {
    0%, 100% {
        box-shadow:
            0 0 20px rgba(233, 190, 121, 0.3),
            0 0 40px rgba(233, 190, 121, 0.2),
            0 0 60px rgba(233, 190, 121, 0.1);
    }
    50% {
        box-shadow:
            0 0 30px rgba(233, 190, 121, 0.5),
            0 0 60px rgba(233, 190, 121, 0.3),
            0 0 90px rgba(233, 190, 121, 0.2);
    }
}

.floating-element.glow {
    animation: float3D 20s infinite ease-in-out, pulseGlow 3s infinite ease-in-out;
}

/* Sound Wave Overlay */
.sound-wave-overlay {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 600px;
    height: 600px;
    pointer-events: none;
}

.sound-wave-overlay::before,
.sound-wave-overlay::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    border-radius: 50%;
    border: 1px solid rgba(188, 162, 139, 0.2);
    animation: soundWaveExpand 4s infinite ease-out;
}

.sound-wave-overlay::before {
    width: 200px;
    height: 200px;
    animation-delay: 0s;
}

.sound-wave-overlay::after {
    width: 300px;
    height: 300px;
    animation-delay: 1s;
}

@keyframes soundWaveExpand {
    0% {
        transform: translate(-50%, -50%) scale(1);
        opacity: 0.6;
    }
    100% {
        transform: translate(-50%, -50%) scale(3);
        opacity: 0;
    }
}

/* Interactive 3D Tilt on Mouse */
.hero-section.tilt-active {
    transition: transform 0.1s ease-out;
}

/* 3D Card Hover Effects for Feature Cards */
.feature-card {
    transform-style: preserve-3d;
    transition: transform 0.6s cubic-bezier(0.23, 1, 0.32, 1), box-shadow 0.6s ease;
}

.feature-card:hover {
    transform: translateY(-10px) rotateX(5deg) rotateY(-5deg) translateZ(20px);
    box-shadow:
        0 30px 60px rgba(0, 0, 0, 0.15),
        0 10px 20px rgba(0, 0, 0, 0.1);
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.1) 0%, transparent 100%);
    border-radius: inherit;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.feature-card:hover::before {
    opacity: 1;
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 800px;
    padding: var(--spacing-xl);
}

.hero-title {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    color: var(--color-secondary);
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.02em;
}

.hero-subtitle {
    font-size: var(--font-size-xl);
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
    font-weight: 500;
}

.hero-description {
    font-size: var(--font-size-lg);
    color: var(--color-gray-600);
    margin-bottom: var(--spacing-xl);
    line-height: 1.8;
}

.hero-cta {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* 3D Singing Bowl Container */
.hero-singing-bowl {
    position: absolute;
    bottom: 15%;
    right: 10%;
    width: 250px;
    perspective: 1000px;
    transform-style: preserve-3d;
    z-index: 10;
}

.bowl-3d-container {
    position: relative;
    transform-style: preserve-3d;
    animation: bowlFloat3D 6s ease-in-out infinite;
}

/* Bowl Aura Glow */
.bowl-aura {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 300px;
    height: 300px;
    transform: translate(-50%, -50%);
    background: radial-gradient(circle,
        rgba(233, 190, 121, 0.3) 0%,
        rgba(233, 190, 121, 0.1) 40%,
        transparent 70%);
    border-radius: 50%;
    animation: auraGlow 3s ease-in-out infinite;
    pointer-events: none;
}

@keyframes auraGlow {
    0%, 100% {
        transform: translate(-50%, -50%) scale(1);
        opacity: 0.5;
    }
    50% {
        transform: translate(-50%, -50%) scale(1.2);
        opacity: 0.8;
    }
}

/* 3D Float Animation */
@keyframes bowlFloat3D {
    0%, 100% {
        transform: translateY(0) rotateX(0deg) rotateY(0deg);
    }
    25% {
        transform: translateY(-15px) rotateX(3deg) rotateY(5deg);
    }
    50% {
        transform: translateY(-25px) rotateX(0deg) rotateY(0deg);
    }
    75% {
        transform: translateY(-10px) rotateX(-3deg) rotateY(-5deg);
    }
}

/* Bowl Shadow Animation */
.bowl-shadow {
    animation: shadowPulse 6s ease-in-out infinite;
}

@keyframes shadowPulse {
    0%, 100% {
        opacity: 0.15;
        transform: scaleX(1);
    }
    50% {
        opacity: 0.08;
        transform: scaleX(0.9);
    }
}

/* Sound Wave Animations */
.singing-bowl-svg .wave {
    animation: waveExpand3D 3s ease-out infinite;
    transform-origin: center;
}

.wave-1 { animation-delay: 0s; }
.wave-2 { animation-delay: 0.4s; }
.wave-3 { animation-delay: 0.8s; }
.wave-4 { animation-delay: 1.2s; }

@keyframes waveExpand3D {
    0% {
        opacity: 0.8;
        transform: scale(1) translateZ(0);
    }
    50% {
        opacity: 0.4;
    }
    100% {
        opacity: 0;
        transform: scale(1.6) translateZ(50px);
    }
}

/* Vibration Lines */
.vib-line {
    animation: vibrate 0.5s ease-in-out infinite;
}

.vib-1 { animation-delay: 0s; }
.vib-2 { animation-delay: 0.1s; }

@keyframes vibrate {
    0%, 100% {
        transform: translateY(0);
        opacity: 0.3;
    }
    50% {
        transform: translateY(2px);
        opacity: 0.5;
    }
}

/* Energy Particles */
.particle {
    animation: particleFloat 4s ease-in-out infinite;
}

.p1 { animation-delay: 0s; animation-duration: 3.5s; }
.p2 { animation-delay: 0.5s; animation-duration: 4s; }
.p3 { animation-delay: 0.2s; animation-duration: 3s; }
.p4 { animation-delay: 0.8s; animation-duration: 4.5s; }
.p5 { animation-delay: 0.3s; animation-duration: 3.8s; }

@keyframes particleFloat {
    0%, 100% {
        transform: translateY(0) scale(1);
        opacity: 0.8;
    }
    25% {
        transform: translateY(-15px) translateX(5px) scale(1.2);
        opacity: 1;
    }
    50% {
        transform: translateY(-25px) translateX(-3px) scale(0.8);
        opacity: 0.6;
    }
    75% {
        transform: translateY(-10px) translateX(8px) scale(1.1);
        opacity: 0.9;
    }
}

/* Bowl Inner Glow Animation */
.bowl-inner {
    animation: innerGlow 4s ease-in-out infinite;
}

@keyframes innerGlow {
    0%, 100% {
        opacity: 0.4;
    }
    50% {
        opacity: 0.7;
    }
}

/* Rim Highlight Shimmer */
.rim-highlight {
    animation: rimShimmer 3s linear infinite;
}

@keyframes rimShimmer {
    0% {
        stroke-dasharray: 50 200;
        stroke-dashoffset: 0;
    }
    100% {
        stroke-dasharray: 50 200;
        stroke-dashoffset: -250;
    }
}

.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--color-gray-500);
    font-size: var(--font-size-sm);
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    50% {
        transform: translateX(-50%) translateY(10px);
    }
}

/* ===== Section Styles ===== */
.section-header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.section-title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--color-secondary);
    margin-bottom: var(--spacing-sm);
}

.section-subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-gray-500);
}

.section-badge {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--color-accent);
    color: var(--color-secondary);
    font-size: var(--font-size-xs);
    font-weight: 600;
    border-radius: var(--radius-full);
    margin-bottom: var(--spacing-md);
}

/* ===== Features Section ===== */
.features-section {
    padding: var(--spacing-3xl) 0;
    background: var(--color-white);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
}

.feature-card {
    text-align: center;
    padding: var(--spacing-xl);
    background: var(--color-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.feature-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto var(--spacing-md);
    color: var(--color-primary);
}

.feature-icon svg {
    width: 100%;
    height: 100%;
}

.feature-card h3 {
    font-size: var(--font-size-xl);
    color: var(--color-secondary);
    margin-bottom: var(--spacing-sm);
}

.feature-card p {
    font-size: var(--font-size-sm);
    color: var(--color-gray-600);
    line-height: 1.7;
}

/* ===== Challenge Section ===== */
.challenge-section {
    padding: var(--spacing-3xl) 0;
    background: var(--color-sand);
}

.challenge-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

.challenge-title {
    font-size: var(--font-size-3xl);
    color: var(--color-secondary);
    margin-bottom: var(--spacing-md);
}

.challenge-desc {
    font-size: var(--font-size-base);
    color: var(--color-gray-600);
    margin-bottom: var(--spacing-xl);
    line-height: 1.8;
}

.challenge-phases {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.phase {
    display: flex;
    gap: var(--spacing-md);
    align-items: flex-start;
}

.phase-number {
    width: 40px;
    height: 40px;
    background: var(--color-primary);
    color: var(--color-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    flex-shrink: 0;
}

.phase-content h4 {
    font-size: var(--font-size-base);
    color: var(--color-secondary);
    margin-bottom: var(--spacing-xs);
}

.phase-content p {
    font-size: var(--font-size-sm);
    color: var(--color-gray-500);
}

.challenge-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.progress-circle {
    position: relative;
    width: 200px;
    height: 200px;
}

.progress-circle svg {
    width: 100%;
    height: 100%;
    transform: rotate(-90deg);
}

.progress-ring {
    transition: stroke-dashoffset 1.5s ease-out;
}

.progress-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
}

.progress-number {
    display: block;
    font-size: var(--font-size-4xl);
    font-weight: 700;
    color: var(--color-secondary);
}

.progress-label {
    display: block;
    font-size: var(--font-size-sm);
    color: var(--color-gray-500);
    letter-spacing: 0.1em;
}

/* ===== Testimonials Section ===== */
.testimonials-section {
    padding: var(--spacing-3xl) 0;
    background: var(--color-white);
}

.testimonials-slider {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
}

.testimonial-card {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
}

.testimonial-content {
    margin-bottom: var(--spacing-lg);
}

.testimonial-content p {
    font-size: var(--font-size-base);
    color: var(--color-gray-600);
    line-height: 1.8;
    font-style: italic;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.author-avatar {
    width: 50px;
    height: 50px;
    background: var(--color-primary);
    color: var(--color-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: var(--font-size-lg);
}

.author-info strong {
    display: block;
    color: var(--color-secondary);
    font-size: var(--font-size-base);
}

.author-info span {
    font-size: var(--font-size-sm);
    color: var(--color-gray-500);
}

/* ===== Directory Section ===== */
.directory-section {
    padding: var(--spacing-3xl) 0;
    background: var(--color-sand);
}

.directory-preview-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.expert-card {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-md);
    transition: transform var(--transition-base);
}

.expert-card:hover {
    transform: translateY(-3px);
}

.expert-avatar {
    width: 60px;
    height: 60px;
    background: var(--color-primary);
    color: var(--color-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-md);
}

.expert-info h4 {
    font-size: var(--font-size-lg);
    color: var(--color-secondary);
    margin-bottom: var(--spacing-xs);
}

.expert-specialty {
    color: var(--color-primary);
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-xs);
}

.expert-location {
    color: var(--color-gray-500);
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-sm);
}

.expert-badge {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--color-accent);
    color: var(--color-secondary);
    font-size: var(--font-size-xs);
    font-weight: 600;
    border-radius: var(--radius-sm);
}

.section-cta {
    text-align: center;
}

/* ===== CTA Section ===== */
.cta-section {
    position: relative;
    padding: var(--spacing-3xl) 0;
    background: linear-gradient(135deg, var(--color-secondary) 0%, var(--color-primary-dark) 100%);
    color: var(--color-white);
    overflow: hidden;
}

.cta-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    opacity: 0.3;
}

.cta-content {
    position: relative;
    z-index: 1;
    text-align: center;
}

.cta-content h2 {
    font-size: var(--font-size-3xl);
    margin-bottom: var(--spacing-md);
}

.cta-content p {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-xl);
    opacity: 0.9;
}

.cta-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* ===== Footer ===== */
.site-footer {
    background: var(--color-secondary);
    color: var(--color-white);
    padding-top: var(--spacing-3xl);
}

.footer-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.footer-top {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--spacing-xl);
    padding-bottom: var(--spacing-2xl);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

.footer-desc {
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.7;
}

.footer-col h4 {
    font-size: var(--font-size-base);
    margin-bottom: var(--spacing-md);
    color: var(--color-white);
}

.footer-col ul li {
    margin-bottom: var(--spacing-sm);
}

.footer-col a {
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.7);
    transition: color var(--transition-fast);
}

.footer-col a:hover {
    color: var(--color-accent);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg) 0;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.footer-legal {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
}

.footer-legal a {
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.6);
}

.footer-legal a:hover {
    color: var(--color-white);
}

.footer-legal .divider {
    color: rgba(255, 255, 255, 0.3);
}

.footer-copyright {
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.5);
}

/* ===== Back to Top ===== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--color-primary);
    color: var(--color-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all var(--transition-base);
    z-index: 999;
    box-shadow: var(--shadow-lg);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background: var(--color-primary-dark);
}

/* ===== Alerts ===== */
.alert {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
    font-size: var(--font-size-sm);
}

.alert-error {
    background: #FEE2E2;
    color: var(--color-error);
}

.alert-success {
    background: #D1FAE5;
    color: var(--color-success);
}

.alert-warning {
    background: #FEF3C7;
    color: #B45309;
}

/* ===== Page Header ===== */
.page-header {
    text-align: center;
    padding: var(--spacing-2xl) 0;
    margin-top: var(--header-height);
}

.page-title {
    font-size: var(--font-size-3xl);
    color: var(--color-secondary);
    margin-bottom: var(--spacing-sm);
}

.page-subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-gray-500);
}

/* ===== Form Elements ===== */
.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-gray-700);
    margin-bottom: var(--spacing-xs);
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--color-gray-300);
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(188, 162, 139, 0.2);
}

.form-group input::placeholder {
    color: var(--color-gray-400);
}

.form-hint {
    display: block;
    font-size: var(--font-size-xs);
    color: var(--color-gray-500);
    margin-top: var(--spacing-xs);
}

.disabled-input {
    background: var(--color-gray-100);
    color: var(--color-gray-500);
    cursor: not-allowed;
}

.required {
    color: var(--color-error);
}

/* Checkbox */
.checkbox-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    cursor: pointer;
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-sm);
}

.checkbox-label input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--color-primary);
}

/* Password Toggle */
.password-input-wrapper {
    position: relative;
}

.toggle-password {
    position: absolute;
    right: var(--spacing-sm);
    top: 50%;
    transform: translateY(-50%);
    padding: var(--spacing-xs);
    color: var(--color-gray-400);
}

.toggle-password:hover {
    color: var(--color-gray-600);
}

/* ===== Cards ===== */
.card {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    overflow: hidden;
}

/* ===== 3D Effects for All Cards ===== */
.testimonial-card,
.expert-card,
.phase {
    transform-style: preserve-3d;
    transition: transform 0.5s cubic-bezier(0.23, 1, 0.32, 1), box-shadow 0.5s ease;
}

.testimonial-card:hover {
    transform: translateY(-8px) rotateX(3deg) rotateY(-2deg) translateZ(20px);
    box-shadow:
        0 25px 50px rgba(0, 0, 0, 0.12),
        0 10px 20px rgba(0, 0, 0, 0.08);
}

.expert-card:hover {
    transform: translateY(-8px) scale(1.02) translateZ(15px);
    box-shadow:
        0 20px 40px rgba(188, 162, 139, 0.2),
        0 10px 20px rgba(0, 0, 0, 0.1);
}

/* 3D Progress Circle */
.progress-circle {
    transform-style: preserve-3d;
    animation: circleFloat 5s ease-in-out infinite;
}

@keyframes circleFloat {
    0%, 100% {
        transform: translateZ(0) rotateY(0deg);
    }
    50% {
        transform: translateZ(30px) rotateY(10deg);
    }
}

/* 3D Phase Numbers */
.phase-number {
    transform-style: preserve-3d;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.phase:hover .phase-number {
    transform: translateZ(20px) scale(1.1) rotateY(15deg);
    box-shadow: 0 10px 30px rgba(188, 162, 139, 0.4);
}

/* CTA Section 3D Background */
.cta-section {
    transform-style: preserve-3d;
    perspective: 1500px;
}

.antigravity-cta {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    overflow: hidden;
    transform-style: preserve-3d;
}

/* 3D Button Effects */
.btn {
    transform-style: preserve-3d;
    transition: all 0.3s cubic-bezier(0.23, 1, 0.32, 1);
    position: relative;
}

.btn::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.2) 0%, transparent 50%);
    border-radius: inherit;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.btn:hover::after {
    opacity: 1;
}

.btn-primary:hover {
    transform: translateY(-3px) translateZ(10px);
    box-shadow:
        0 10px 30px rgba(188, 162, 139, 0.4),
        0 5px 15px rgba(0, 0, 0, 0.1);
}

.btn-outline:hover {
    transform: translateY(-3px) translateZ(10px);
    box-shadow: 0 10px 30px rgba(188, 162, 139, 0.3);
}

.btn-lg {
    transform-style: preserve-3d;
}

.btn-lg:active {
    transform: translateY(0) translateZ(0) scale(0.98);
}

/* 3D Section Headers */
.section-header {
    transform-style: preserve-3d;
}

.section-title {
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
    border-radius: 2px;
}

/* Glassmorphism Effects */
.hero-content {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

/* Animated Gradient Background */
@keyframes gradientShift {
    0% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
    100% {
        background-position: 0% 50%;
    }
}

.cta-section {
    background: linear-gradient(-45deg,
        var(--color-secondary),
        #3d5a7a,
        var(--color-primary-dark),
        #6b5a4d);
    background-size: 400% 400%;
    animation: gradientShift 15s ease infinite;
}

/* Glow Text Effect */
.hero-title {
    text-shadow:
        0 0 20px rgba(188, 162, 139, 0.3),
        0 0 40px rgba(188, 162, 139, 0.2),
        0 0 60px rgba(188, 162, 139, 0.1);
}

/* Magnetic Hover Effect for Cards */
.feature-card,
.testimonial-card,
.expert-card {
    position: relative;
    overflow: hidden;
}

.feature-card::after,
.testimonial-card::after,
.expert-card::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
    opacity: 0;
    transition: opacity 0.5s ease;
    pointer-events: none;
}

.feature-card:hover::after,
.testimonial-card:hover::after,
.expert-card:hover::after {
    opacity: 1;
}

/* Scroll Reveal Animation Classes */
[data-aos="fade-up"] {
    opacity: 0;
    transform: translateY(30px) translateZ(-20px);
    transition: opacity 0.6s ease, transform 0.6s cubic-bezier(0.23, 1, 0.32, 1);
}

[data-aos="fade-up"].aos-animate {
    opacity: 1;
    transform: translateY(0) translateZ(0);
}

[data-aos="zoom-in"] {
    opacity: 0;
    transform: scale(0.9) translateZ(-50px);
    transition: opacity 0.5s ease, transform 0.5s cubic-bezier(0.23, 1, 0.32, 1);
}

[data-aos="zoom-in"].aos-animate {
    opacity: 1;
    transform: scale(1) translateZ(0);
}

/* Loading Shimmer Effect */
@keyframes shimmer {
    0% {
        background-position: -200% 0;
    }
    100% {
        background-position: 200% 0;
    }
}

.loading-shimmer {
    background: linear-gradient(
        90deg,
        var(--color-gray-100) 25%,
        var(--color-gray-200) 50%,
        var(--color-gray-100) 75%
    );
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
}

/* ===== Utility Classes ===== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.mt-md { margin-top: var(--spacing-md); }
.mb-md { margin-bottom: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mb-lg { margin-bottom: var(--spacing-lg); }

.pt-0 { padding-top: 0; }
.pb-0 { padding-bottom: 0; }

.d-none { display: none; }
.d-block { display: block; }
.d-flex { display: flex; }
.d-grid { display: grid; }

.gap-sm { gap: var(--spacing-sm); }
.gap-md { gap: var(--spacing-md); }
.gap-lg { gap: var(--spacing-lg); }

.flex-wrap { flex-wrap: wrap; }
.justify-center { justify-content: center; }
.align-center { align-items: center; }
.justify-between { justify-content: space-between; }

/* ===== Responsive - Desktop First ===== */
@media (min-width: 1024px) {
    .mobile-menu-toggle {
        display: none;
    }

    .main-nav {
        display: block;
    }

    .user-menu .btn {
        display: inline-flex;
    }
}

/* Add margin-top to main content for fixed header */
.main-content {
    padding-top: var(--header-height);
}