/* ================================
   Cordolium - Main Stylesheet
   ================================ */

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

:root {
    --black: #000000;
    --white: #ffffff;
    --gray-100: #f7f7f7;
    --gray-200: #e5e5e5;
    --gray-300: #d4d4d4;
    --gray-400: #a3a3a3;
    --gray-500: #737373;
    --gray-600: #525252;
    --gray-700: #404040;
    --gray-800: #262626;
    --gray-900: #171717;

    /* Animation timings */
    --transition-fast: 0.2s;
    --transition-medium: 0.3s;
    --transition-slow: 0.6s;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--black);
    background: var(--white);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
}

/* Navigation */
nav {
    position: fixed;
    width: 100%;
    top: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    z-index: 1000;
    border-bottom: 1px solid var(--gray-200);
    transition: all var(--transition-medium) ease;
}

nav.scrolled {
    padding: 12px 0;
    box-shadow: 0 2px 20px rgba(0,0,0,0.08);
}

.nav-container {
    max-width: 1440px;
    margin: 0 auto;
    padding: 24px 48px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    cursor: pointer;
    text-decoration: none;
}

.logo-icon {
    width: 40px;
    height: 40px;
    margin-right: 16px;
    object-fit: contain;
    filter: drop-shadow(0 2px 8px rgba(0,0,0,0.1));
    transition: transform var(--transition-fast) ease;
}

.logo:hover .logo-icon {
    transform: scale(1.05);
}

.logo-text {
    font-size: 20px;
    font-weight: 600;
    letter-spacing: 0.5px;
    color: var(--black);
}

.nav-links {
    display: flex;
    gap: 48px;
    list-style: none;
    align-items: center;
}

.nav-links a {
    text-decoration: none;
    color: var(--gray-600);
    font-size: 14px;
    font-weight: 500;
    transition: color var(--transition-fast) ease;
    letter-spacing: 0.2px;
}

.nav-links a:hover {
    color: var(--black);
}

.nav-cta {
    background: var(--black);
    color: var(--white) !important;
    padding: 10px 24px;
    border-radius: 8px;
    text-decoration: none;
    font-size: 14px;
    font-weight: 600;
    transition: all var(--transition-fast) ease;
    letter-spacing: 0.3px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.15);
}

.nav-cta:hover {
    background: var(--gray-800);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.2);
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.mobile-menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--black);
    transition: all var(--transition-fast) ease;
}

/* Hero Section */
.hero {
    margin-top: 81px;
    min-height: calc(100vh - 81px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 80px 48px;
    position: relative;
    background: linear-gradient(180deg, var(--white) 0%, var(--gray-100) 100%);
    overflow: hidden;
}

.hero-background {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    pointer-events: none;
    overflow: hidden;
}

/* AI Tech Grid Animation */
.hero-background::before {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    background-image:
        linear-gradient(rgba(0,0,0,0.015) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0,0,0,0.015) 1px, transparent 1px);
    background-size: 60px 60px;
    animation: gridMove 25s linear infinite;
    opacity: 0.6;
}

@keyframes gridMove {
    0% { transform: translate(0, 0); }
    100% { transform: translate(60px, 60px); }
}

/* Neural Network SVG Animation - More Pronounced */
.neural-network {
    position: absolute;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0.4;
}

.network-svg {
    width: 85%;
    max-width: 1200px;
    height: auto;
}

/* Animate connection lines - More visible */
.connections line {
    stroke: rgba(0,0,0,0.15);
    stroke-width: 1.5;
    stroke-dasharray: 500;
    stroke-dashoffset: 500;
    animation: drawLine 3s ease-in-out infinite;
}

.connections .line-1 { animation-delay: 0s; }
.connections .line-2 { animation-delay: 0.15s; }
.connections .line-3 { animation-delay: 0.3s; }
.connections .line-4 { animation-delay: 0.45s; }
.connections .line-5 { animation-delay: 0.6s; }
.connections .line-6 { animation-delay: 0.75s; }
.connections .line-7 { animation-delay: 0.9s; }
.connections .line-8 { animation-delay: 1.05s; }
.connections .line-9 { animation-delay: 1.2s; }
.connections .line-10 { animation-delay: 1.35s; }
.connections .line-11 { animation-delay: 1.5s; }
.connections .line-12 { animation-delay: 1.65s; }

@keyframes drawLine {
    0% {
        stroke-dashoffset: 500;
        opacity: 0.2;
    }
    50% {
        stroke-dashoffset: 0;
        opacity: 1;
    }
    100% {
        stroke-dashoffset: -500;
        opacity: 0.2;
    }
}

/* Animate nodes - More visible and dynamic */
.nodes circle {
    fill: rgba(0,0,0,0.2);
    animation: nodePulse 2s ease-in-out infinite;
}

.nodes .node-1 { animation-delay: 0s; }
.nodes .node-2 { animation-delay: 0.2s; }
.nodes .node-3 { animation-delay: 0.4s; }
.nodes .node-4 { animation-delay: 0.6s; }
.nodes .node-5 { animation-delay: 0.8s; }
.nodes .node-6 { animation-delay: 1s; }
.nodes .node-7 { animation-delay: 1.2s; }
.nodes .node-8 { animation-delay: 1.4s; }
.nodes .node-9 { animation-delay: 1.6s; }
.nodes .node-10 { animation-delay: 1.8s; }
.nodes .node-11 { animation-delay: 2s; }
.nodes .node-12 { animation-delay: 2.2s; }
.nodes .node-13 { animation-delay: 2.4s; }

@keyframes nodePulse {
    0%, 100% {
        opacity: 0.4;
        transform: scale(1);
        fill: rgba(0,0,0,0.2);
    }
    50% {
        opacity: 1;
        transform: scale(1.5);
        fill: rgba(0,0,0,0.35);
    }
}

.hero-content {
    text-align: center;
    max-width: 1000px;
    position: relative;
    z-index: 1;
}

.hero h1 {
    font-size: 80px;
    font-weight: 700;
    line-height: 1;
    letter-spacing: -2px;
    margin-bottom: 32px;
    animation: fadeInUp 1s ease;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-subtitle {
    font-size: 24px;
    color: var(--gray-600);
    margin-bottom: 16px;
    font-weight: 400;
    animation: fadeInUp 1s ease 0.1s both;
}

.tagline {
    font-size: 13px;
    color: var(--black);
    text-transform: uppercase;
    letter-spacing: 5px;
    margin-bottom: 56px;
    font-weight: 600;
    animation: fadeInUp 1s ease 0.2s both, textGlow 3s ease-in-out infinite;
    position: relative;
    padding: 12px 32px;
    background: linear-gradient(135deg, rgba(0,0,0,0.03) 0%, rgba(0,0,0,0.01) 100%);
    border-radius: 50px;
    display: inline-block;
    border: 1px solid rgba(0,0,0,0.08);
    backdrop-filter: blur(10px);
}

@keyframes textGlow {
    0%, 100% {
        box-shadow: 0 0 20px rgba(0,0,0,0.05);
        border-color: rgba(0,0,0,0.08);
    }
    50% {
        box-shadow: 0 0 30px rgba(0,0,0,0.1), 0 0 60px rgba(0,0,0,0.05);
        border-color: rgba(0,0,0,0.15);
    }
}

.hero-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    animation: fadeInUp 1s ease 0.3s both;
}

/* Buttons */
.btn-primary {
    background: var(--black);
    color: var(--white);
    padding: 14px 32px;
    border-radius: 6px;
    text-decoration: none;
    font-size: 15px;
    font-weight: 500;
    transition: opacity var(--transition-fast) ease;
    display: inline-block;
    letter-spacing: 0.2px;
    cursor: pointer;
    border: none;
}

.btn-primary:hover {
    opacity: 0.8;
}

.btn-secondary {
    background: transparent;
    color: var(--black);
    padding: 14px 32px;
    border-radius: 6px;
    text-decoration: none;
    font-size: 15px;
    font-weight: 500;
    border: 1px solid var(--gray-300);
    transition: all var(--transition-fast) ease;
    display: inline-block;
    letter-spacing: 0.2px;
    cursor: pointer;
}

.btn-secondary:hover {
    border-color: var(--black);
    background: var(--black);
    color: var(--white);
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 48px;
}

/* Introduction Section */
.introduction {
    padding: 160px 48px;
    background: var(--white);
}

.intro-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.intro-content h2 {
    font-size: 48px;
    font-weight: 600;
    letter-spacing: -1px;
    margin-bottom: 32px;
}

.intro-content p {
    font-size: 20px;
    color: var(--gray-600);
    line-height: 1.8;
    margin-bottom: 24px;
}

/* Features Section */
.features {
    padding: 160px 48px;
    background: var(--gray-100);
}

.features-header {
    text-align: center;
    margin-bottom: 80px;
}

.features-header h2 {
    font-size: 48px;
    font-weight: 600;
    letter-spacing: -1px;
    margin-bottom: 16px;
}

.features-header p {
    font-size: 20px;
    color: var(--gray-600);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 48px;
}

.feature-card {
    background: var(--white);
    padding: 48px 40px;
    border-radius: 12px;
    border: 1px solid var(--gray-200);
    transition: all var(--transition-medium) ease;
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 40px rgba(0,0,0,0.08);
    border-color: var(--gray-300);
}

.feature-title {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
    letter-spacing: -0.2px;
}

.feature-description {
    font-size: 15px;
    color: var(--gray-600);
    line-height: 1.7;
}

/* Voice Demo Section */
.voice-section {
    padding: 160px 48px;
    background: var(--white);
}

.voice-container {
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
}

.voice-container h2 {
    font-size: 48px;
    font-weight: 600;
    letter-spacing: -1px;
    margin-bottom: 48px;
}

.voice-interface {
    background: var(--gray-100);
    border-radius: 16px;
    padding: 48px;
    position: relative;
    border: 1px solid var(--gray-200);
}

.voice-orb {
    width: 120px;
    height: 120px;
    margin: 0 auto 32px;
    background: radial-gradient(circle at 30% 30%, var(--gray-800), var(--black));
    border-radius: 50%;
    position: relative;
    animation: pulse 3s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.05); opacity: 0.9; }
}

.voice-orb::before {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    border: 2px solid rgba(0,0,0,0.1);
    animation: ripple 3s ease-in-out infinite;
}

@keyframes ripple {
    0% { transform: scale(1); opacity: 1; }
    100% { transform: scale(1.5); opacity: 0; }
}

.voice-text {
    font-size: 18px;
    color: var(--gray-700);
    font-style: italic;
    transition: opacity var(--transition-medium) ease;
}

.voice-status {
    margin-top: 24px;
    font-size: 13px;
    color: var(--gray-500);
    text-transform: uppercase;
    letter-spacing: 2px;
}

/* Technology Section */
.technology {
    padding: 160px 48px;
    background: var(--gray-100);
}

.tech-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 120px;
    align-items: center;
}

.tech-content h2 {
    font-size: 48px;
    font-weight: 600;
    letter-spacing: -1px;
    margin-bottom: 32px;
}

.tech-content p {
    font-size: 18px;
    color: var(--gray-600);
    line-height: 1.8;
    margin-bottom: 24px;
}

.tech-visual {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.tech-logo {
    width: 300px;
    height: 300px;
    opacity: 0.8;
    animation: float 6s ease-in-out infinite;
    object-fit: contain;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
}

/* CTA Section */
.cta {
    padding: 160px 48px;
    background: var(--black);
    color: var(--white);
    text-align: center;
}

.cta h2 {
    font-size: 56px;
    font-weight: 600;
    letter-spacing: -1px;
    margin-bottom: 24px;
}

.cta p {
    font-size: 20px;
    margin-bottom: 48px;
    opacity: 0.7;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.cta-input-group {
    max-width: 500px;
    margin: 0 auto;
    display: flex;
    gap: 12px;
}

.cta-input {
    flex: 1;
    padding: 14px 20px;
    border-radius: 6px;
    border: 1px solid rgba(255,255,255,0.2);
    background: rgba(255,255,255,0.1);
    color: var(--white);
    font-size: 15px;
    transition: all var(--transition-fast) ease;
}

.cta-input::placeholder {
    color: rgba(255,255,255,0.5);
}

.cta-input:focus {
    outline: none;
    border-color: rgba(255,255,255,0.4);
    background: rgba(255,255,255,0.15);
}

.cta-button {
    background: var(--white);
    color: var(--black);
    padding: 14px 32px;
    border-radius: 6px;
    border: none;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: opacity var(--transition-fast) ease;
    letter-spacing: 0.2px;
}

.cta-button:hover {
    opacity: 0.9;
}

/* Footer */
footer {
    padding: 48px;
    background: var(--white);
    border-top: 1px solid var(--gray-200);
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-links {
    display: flex;
    gap: 40px;
    list-style: none;
}

.footer-links a {
    color: var(--gray-600);
    text-decoration: none;
    font-size: 14px;
    transition: color var(--transition-fast) ease;
}

.footer-links a:hover {
    color: var(--black);
}

.copyright {
    color: var(--gray-500);
    font-size: 14px;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 2000;
}

.modal.active {
    display: block;
}

.modal-overlay {
    position: absolute;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    animation: fadeIn var(--transition-medium) ease;
}

.modal-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: var(--white);
    padding: 48px;
    border-radius: 16px;
    max-width: 480px;
    text-align: center;
    animation: modalSlide var(--transition-medium) ease;
}

@keyframes modalSlide {
    from {
        opacity: 0;
        transform: translate(-50%, -40%);
    }
    to {
        opacity: 1;
        transform: translate(-50%, -50%);
    }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.modal-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 24px;
    background: var(--gray-100);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
}

.modal h3 {
    font-size: 24px;
    margin-bottom: 16px;
}

.modal p {
    color: var(--gray-600);
    margin-bottom: 32px;
    line-height: 1.6;
}

.modal-buttons {
    display: flex;
    gap: 12px;
    justify-content: center;
}

.modal-btn {
    padding: 12px 24px;
    border-radius: 6px;
    border: none;
    font-size: 15px;
    font-weight: 500;
    cursor: pointer;
    transition: opacity var(--transition-fast) ease;
}

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

.modal-btn-secondary {
    background: var(--gray-100);
    color: var(--black);
}

.modal-btn:hover {
    opacity: 0.8;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .tech-grid {
        grid-template-columns: 1fr;
        gap: 60px;
        text-align: center;
    }

    .tech-visual {
        order: -1;
    }
}

@media (max-width: 768px) {
    /* Navigation */
    .nav-container {
        padding: 16px 24px;
    }

    .nav-links {
        position: fixed;
        top: 73px;
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        padding: 24px;
        gap: 0;
        box-shadow: 0 4px 20px rgba(0,0,0,0.1);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s ease;
        z-index: 999;
        border-bottom: 1px solid var(--gray-200);
    }

    .nav-links.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .nav-links li {
        width: 100%;
        padding: 0;
        border-bottom: 1px solid var(--gray-200);
    }

    .nav-links li:last-child {
        border-bottom: none;
        padding-bottom: 8px;
    }

    .nav-links a {
        display: block;
        padding: 16px 12px;
        font-size: 16px;
        min-height: 52px;
        width: 100%;
        -webkit-tap-highlight-color: rgba(0, 0, 0, 0.05);
        transition: background-color 0.2s ease;
    }

    .nav-links a:active {
        background-color: var(--gray-100);
    }

    .nav-cta {
        margin: 12px;
        display: block;
        text-align: center;
        padding: 16px 24px !important;
        border-radius: 8px;
        min-height: 52px;
        width: calc(100% - 24px);
        box-sizing: border-box;
    }

    .nav-cta:active {
        background: var(--gray-900) !important;
        transform: scale(0.98);
    }

    .mobile-menu-toggle {
        display: flex;
        z-index: 1000;
    }

    .mobile-menu-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .mobile-menu-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .mobile-menu-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }

    /* Hero */
    .hero {
        padding: 60px 24px;
    }

    .hero h1 {
        font-size: 56px;
    }

    .hero-subtitle {
        font-size: 20px;
    }

    .hero-buttons {
        flex-direction: column;
        width: 100%;
        max-width: 300px;
        margin: 0 auto;
    }

    .hero-buttons a {
        width: 100%;
    }

    /* Sections */
    .introduction,
    .features,
    .voice-section,
    .technology,
    .cta {
        padding: 80px 24px;
    }

    .container {
        padding: 0 24px;
    }

    /* Features */
    .features-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .feature-card {
        padding: 32px 24px;
    }

    /* CTA */
    .cta h2 {
        font-size: 40px;
    }

    .cta-input-group {
        flex-direction: column;
    }

    .cta-input,
    .cta-button {
        width: 100%;
    }

    /* Footer */
    .footer-content {
        flex-direction: column;
        gap: 24px;
        text-align: center;
    }

    .footer-links {
        flex-direction: column;
        gap: 16px;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 40px;
    }

    .hero-subtitle {
        font-size: 18px;
    }

    .tagline {
        font-size: 10px;
        letter-spacing: 2px;
        padding: 10px 20px;
    }

    .intro-content h2,
    .features-header h2,
    .voice-container h2,
    .tech-content h2 {
        font-size: 32px;
    }

    .intro-content p,
    .tech-content p {
        font-size: 16px;
    }

    .feature-card {
        padding: 24px 20px;
    }

    .voice-interface {
        padding: 32px 20px;
    }

    .voice-orb {
        width: 100px;
        height: 100px;
    }

    .voice-text {
        font-size: 16px;
    }
}

/* iPhone specific improvements */
@media (max-width: 414px) {
    /* Better touch targets */
    .btn-primary,
    .btn-secondary,
    .cta-button {
        min-height: 48px;
        padding: 14px 24px;
        font-size: 16px;
    }

    .nav-links a {
        min-height: 44px;
        display: flex;
        align-items: center;
    }

    /* Fix iOS zoom issues */
    input,
    button,
    select,
    textarea {
        font-size: 16px;
    }

    /* Better spacing for small screens */
    .hero {
        padding: 40px 20px;
        min-height: calc(100vh - 73px);
    }

    .introduction,
    .features,
    .voice-section,
    .technology,
    .cta {
        padding: 60px 20px;
    }

    .container {
        padding: 0 20px;
    }
}

/* Safe area for iPhone notch */
@supports (padding: max(0px)) {
    .nav-container {
        padding-left: max(24px, env(safe-area-inset-left));
        padding-right: max(24px, env(safe-area-inset-right));
    }

    .hero,
    .introduction,
    .features,
    .voice-section,
    .technology,
    .cta {
        padding-left: max(48px, env(safe-area-inset-left));
        padding-right: max(48px, env(safe-area-inset-right));
    }

    @media (max-width: 768px) {
        .hero,
        .introduction,
        .features,
        .voice-section,
        .technology,
        .cta {
            padding-left: max(24px, env(safe-area-inset-left));
            padding-right: max(24px, env(safe-area-inset-right));
        }
    }
}