/* Modern Design System for EFL Audio Creator */

:root {
    /* Color Palette */
    --color-bg: #0f172a;
    --color-bg-alt: #1e293b;
    --color-card-bg: rgba(15, 23, 42, 0.35);
    --color-card-border: rgba(255, 255, 255, 0.08);
    
    --color-primary: #6366f1; /* Indigo */
    --color-primary-hover: #4f46e5;
    --color-primary-glow: rgba(99, 102, 241, 0.2);
    
    --color-secondary: #14b8a6; /* Teal */
    --color-secondary-hover: #0d9488;
    
    --color-text-primary: #f8fafc; /* Slate 50 */
    --color-text-secondary: #94a3b8; /* Slate 400 */
    --color-text-muted: #64748b; /* Slate 500 */
    
    --color-error: #f43f5e;
    --color-success: #10b981;
    
    /* Typography */
    --font-heading: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    
    /* Layout */
    --container-max-width: 1200px;
    --border-radius-sm: 8px;
    --border-radius-md: 16px;
    --border-radius-lg: 24px;
    
    /* Transitions */
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    background-color: var(--color-bg);
    color: var(--color-text-primary);
    font-family: var(--font-body);
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    width: 100%;
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 2rem;
}

/* Background Ambient Glows */
.bg-gradient-glow {
    position: absolute;
    width: 500px;
    height: 500px;
    border-radius: 50%;
    filter: blur(120px);
    opacity: 0.15;
    pointer-events: none;
    z-index: 0;
}

.bg-gradient-glow.top-left {
    top: -100px;
    left: -100px;
    background: radial-gradient(circle, var(--color-primary) 0%, transparent 70%);
}

.bg-gradient-glow.bottom-right {
    bottom: 10%;
    right: -100px;
    background: radial-gradient(circle, var(--color-secondary) 0%, transparent 70%);
}

/* Typography Helpers */
h1, h2, h3, h4 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.25;
}

p {
    color: var(--color-text-secondary);
}

/* Header & Navigation */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 100;
    background: rgba(15, 23, 42, 0.7);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-card-border);
    transition: var(--transition-fast);
}

.header-container {
    height: 80px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-container {
    display: flex;
    flex-direction: column;
    text-decoration: none;
    justify-content: center;
}

.logo-title {
    font-family: var(--font-heading);
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--color-text-primary);
    line-height: 1.15;
    letter-spacing: -0.01em;
}

.logo-subline {
    font-family: var(--font-body);
    font-size: 0.56rem;
    font-weight: 600;
    color: var(--color-text-muted);
    letter-spacing: 0.26em;
    text-transform: uppercase;
    line-height: 1;
    margin-top: 4px;
    display: block;
}

.logo-subline strong {
    font-weight: 700;
    color: var(--color-secondary);
}

.logo-accent {
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-link {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    transition: var(--transition-fast);
}

.nav-link:hover {
    color: var(--color-text-primary);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.8rem 1.6rem;
    font-family: var(--font-body);
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: var(--border-radius-sm);
    text-decoration: none;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    cursor: pointer;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-hover));
    color: white;
    border: none;
    box-shadow: 0 4px 14px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.4);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.05);
    color: var(--color-text-primary);
    border: 1px solid var(--color-card-border);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
}

.btn-outline {
    background: transparent;
    color: var(--color-text-primary);
    border: 2px solid rgba(255, 255, 255, 0.15);
}

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

/* Badge */
.badge {
    display: inline-block;
    padding: 0.35rem 0.85rem;
    background: var(--color-primary-glow);
    color: var(--color-primary);
    border: 1px solid rgba(99, 102, 241, 0.3);
    border-radius: 9999px;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    margin-bottom: 1.5rem;
}

/* Hero Section */
.hero-section {
    padding-top: 160px;
    padding-bottom: 100px;
    position: relative;
    z-index: 1;
}

.hero-container {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-content {
    max-width: 600px;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, #ffffff 40%, var(--color-text-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -0.02em;
}

.hero-subtitle {
    font-size: 1.2rem;
    line-height: 1.6;
    margin-bottom: 1rem;
}

.hero-tagline {
    font-family: var(--font-heading);
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--color-secondary);
    letter-spacing: 0.05em;
    text-transform: uppercase;
    margin-bottom: 2.5rem;
}

.hero-actions {
    display: flex;
    gap: 1rem;
}

.hero-visual {
    position: relative;
}

.image-wrapper {
    position: relative;
    border-radius: var(--border-radius-md);
    overflow: hidden;
    border: 1px solid var(--color-card-border);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
    background-color: var(--color-bg-alt);
    transition: transform 0.5s ease;
}

.image-wrapper:hover {
    transform: scale(1.02);
}

.hero-img {
    width: 100%;
    height: auto;
    display: block;
    mix-blend-mode: normal;
}

.image-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(0deg, var(--color-bg) 0%, transparent 100%);
    pointer-events: none;
    opacity: 0.4;
}

/* Features Section */
.features-section {
    padding: 100px 0;
    background: linear-gradient(180deg, var(--color-bg) 0%, var(--color-bg-alt) 100%);
    position: relative;
    z-index: 1;
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 4rem auto;
}

.section-title {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, #ffffff 60%, var(--color-text-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.section-desc {
    font-size: 1.1rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
}

.feature-card {
    background: var(--color-card-bg);
    border: 1px solid var(--color-card-border);
    border-radius: var(--border-radius-md);
    padding: 2.5rem;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.feature-card:hover {
    transform: translateY(-5px);
    border-color: rgba(99, 102, 241, 0.3);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3), 0 0 40px rgba(99, 102, 241, 0.05);
}

.feature-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    background: rgba(99, 102, 241, 0.1);
    color: var(--color-primary);
    border-radius: var(--border-radius-sm);
    margin-bottom: 1.5rem;
    border: 1px solid rgba(99, 102, 241, 0.2);
}

.feature-card:hover .feature-icon {
    background: var(--color-primary);
    color: white;
    transform: scale(1.05);
    transition: all 0.2s ease;
}

.feature-title {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: var(--color-text-primary);
}

.feature-text {
    font-size: 0.95rem;
    line-height: 1.6;
}

/* About Section */
.about-section {
    padding: 100px 0;
    position: relative;
    z-index: 1;
}

.about-container {
    display: flex;
    justify-content: center;
}

.about-info {
    max-width: 800px;
    text-align: center;
}

.about-info .section-title {
    margin-bottom: 2rem;
}

.about-paragraphs {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    font-size: 1.1rem;
    line-height: 1.8;
}

.about-paragraphs p {
    text-align: left;
}

/* Contact Section */
.contact-section {
    padding: 100px 0 140px 0;
    background: linear-gradient(180deg, var(--color-bg-alt) 0%, var(--color-bg) 100%);
    position: relative;
    z-index: 1;
}

.contact-container {
    max-width: 1100px;
}

.contact-card {
    background: var(--color-card-bg);
    border: 1px solid var(--color-card-border);
    border-radius: var(--border-radius-lg);
    padding: 3.5rem;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    display: grid;
    grid-template-columns: 1.15fr 1fr;
    gap: 3.5rem;
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.4);
}

.contact-info-block {
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.contact-title {
    font-size: 2.2rem;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, #ffffff 60%, var(--color-text-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.contact-subtitle {
    font-size: 0.95rem;
    margin-bottom: 2.5rem;
}

.email-details {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.email-label {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.email-copy-wrapper {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    position: relative;
}

.email-link {
    color: var(--color-secondary);
    text-decoration: none;
    font-size: 1.05rem;
    font-weight: 500;
    transition: var(--transition-fast);
    word-break: normal;
    border-bottom: 1px dashed rgba(20, 184, 166, 0.4);
}

.email-link:hover {
    color: var(--color-text-primary);
    border-bottom-color: var(--color-text-primary);
}

.btn-copy {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--color-card-border);
    color: var(--color-text-secondary);
    width: 36px;
    height: 36px;
    border-radius: var(--border-radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition-fast);
    position: relative;
}

.btn-copy:hover {
    background: rgba(255, 255, 255, 0.12);
    color: var(--color-text-primary);
}

.copy-icon {
    pointer-events: none;
}

.copy-tooltip {
    position: absolute;
    bottom: calc(100% + 8px);
    left: 50%;
    transform: translateX(-50%) translateY(4px);
    background: rgba(18, 21, 40, 0.95);
    border: 1px solid var(--color-card-border);
    color: var(--color-text-primary);
    padding: 0.35rem 0.75rem;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 500;
    pointer-events: none;
    opacity: 0;
    transition: all 0.2s cubic-bezier(0.18, 0.89, 0.32, 1.28);
}

.btn-copy:hover .copy-tooltip {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

/* Contact Form Styling */
.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    justify-content: center;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.25rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    position: relative;
}

.form-group label {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--color-text-secondary);
}

.form-group input,
.form-group textarea {
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid var(--color-card-border);
    border-radius: var(--border-radius-sm);
    padding: 0.8rem 1rem;
    color: var(--color-text-primary);
    font-family: var(--font-body);
    font-size: 0.95rem;
    transition: var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
    background: rgba(15, 23, 42, 0.8);
}

.error-msg {
    color: var(--color-error);
    font-size: 0.75rem;
    display: none;
    margin-top: 0.25rem;
}

.form-group.has-error input,
.form-group.has-error textarea {
    border-color: var(--color-error);
}

.form-group.has-error .error-msg {
    display: block;
}

.btn-submit {
    position: relative;
    overflow: hidden;
    height: 48px;
}

.btn-submit .spinner {
    width: 20px;
    height: 20px;
    animation: rotate 2s linear infinite;
}

.btn-submit .spinner .path {
    stroke: currentColor;
    stroke-linecap: round;
    animation: dash 1.5s ease-in-out infinite;
}

.form-feedback {
    font-size: 0.9rem;
    text-align: center;
    border-radius: var(--border-radius-sm);
    transition: var(--transition-fast);
    opacity: 0;
    max-height: 0;
    overflow: hidden;
}

.form-feedback.show {
    opacity: 1;
    max-height: 80px;
    padding: 0.75rem 1rem;
    margin-top: 0.5rem;
}

.form-feedback.success {
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.2);
    color: var(--color-success);
}

.form-feedback.error {
    background: rgba(244, 63, 94, 0.1);
    border: 1px solid rgba(244, 63, 94, 0.2);
    color: var(--color-error);
}

@keyframes rotate {
    100% {
        transform: rotate(360deg);
    }
}

@keyframes dash {
    0% {
        stroke-dasharray: 1, 150;
        stroke-dashoffset: 0;
    }
    50% {
        stroke-dasharray: 90, 150;
        stroke-dashoffset: -35;
    }
    100% {
        stroke-dasharray: 90, 150;
        stroke-dashoffset: -124;
    }
}

/* Footer Section */
.footer {
    border-top: 1px solid var(--color-card-border);
    padding: 2.5rem 0;
    background-color: var(--color-bg);
    font-size: 0.9rem;
    color: var(--color-text-muted);
}

.footer-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-tagline {
    font-family: var(--font-heading);
    font-size: 0.8rem;
    font-weight: 600;
    color: rgba(20, 184, 166, 0.5);
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

/* Responsive Styles */

@media (max-width: 992px) {
    .hero-container {
        grid-template-columns: 1fr;
        gap: 3rem;
        text-align: center;
    }
    
    .hero-content {
        margin: 0 auto;
    }
    
    .hero-title {
        font-size: 3rem;
    }
    
    .hero-actions {
        justify-content: center;
    }
    
    .hero-visual {
        max-width: 500px;
        margin: 0 auto;
    }
    
    .contact-card {
        grid-template-columns: 1fr;
        gap: 2.5rem;
        padding: 2.5rem;
    }
    
    .contact-info-block {
        text-align: center;
    }
    
    .email-copy-wrapper {
        justify-content: center;
    }
}

@media (max-width: 768px) {
    html {
        font-size: 15px;
    }
    
    .header-container {
        height: 70px;
    }
    
    .nav {
        gap: 1rem;
    }
    
    .nav-link {
        font-size: 0.9rem;
    }
    
    .hero-section {
        padding-top: 120px;
        padding-bottom: 60px;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .feature-card {
        padding: 2rem;
    }
    
    .form-row {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .footer-container {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .email-link {
        font-size: 0.95rem;
        word-break: break-all;
    }
}