@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600&display=swap');

:root {
    /* Dark Theme (Default) */
    --bg-color: #0f172a;
    --bg-gradient: radial-gradient(circle at 50% 50%, #1e293b, #0f172a);
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --accent-primary: #38bdf8;
    --accent-gradient: linear-gradient(135deg, #38bdf8, #818cf8);
    --glow-color: rgba(56, 189, 248, 0.25);
    --toggle-icon-color: #f8fafc;
    --modal-bg: rgba(15, 23, 42, 0.98);
    --modal-card-bg: rgba(30, 41, 59, 0.8);
    --modal-border: rgba(56, 189, 248, 0.2);
    --input-bg: rgba(30, 41, 59, 0.6);
    --input-border: rgba(148, 163, 184, 0.3);
}

[data-theme="light"] {
    /* Light Theme */
    --bg-color: #f1f5f9;
    --bg-gradient: radial-gradient(circle at 50% 50%, #ffffff, #f1f5f9);
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #64748b;
    --accent-primary: #0ea5e9;
    --accent-gradient: linear-gradient(135deg, #0ea5e9, #6366f1);
    --glow-color: rgba(14, 165, 233, 0.25);
    --toggle-icon-color: #0f172a;
    --modal-bg: rgba(255, 255, 255, 0.98);
    --modal-card-bg: rgba(241, 245, 249, 0.9);
    --modal-border: rgba(14, 165, 233, 0.2);
    --input-bg: rgba(241, 245, 249, 0.8);
    --input-border: rgba(71, 85, 105, 0.3);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    background-color: var(--bg-color);
    transition: background-color 0.3s ease;
}

body {
    background: var(--bg-gradient);
    font-family: 'DM Sans', sans-serif;
    color: var(--text-primary);
    overflow-x: hidden;
    transition: background 0.3s ease, color 0.3s ease;
}

/* Navigation Buttons */
.nav-buttons {
    position: fixed;
    top: 1.5rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 0.75rem;
    z-index: 1000;
}

.nav-btn {
    background: transparent;
    border: 1px solid var(--modal-border);
    color: var(--text-secondary);
    padding: 0.5rem 1.25rem;
    font-family: 'DM Sans', sans-serif;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    border-radius: 2rem;
    transition: all 0.3s ease;
    backdrop-filter: blur(8px);
}

.nav-btn:hover {
    color: var(--accent-primary);
    border-color: var(--accent-primary);
    box-shadow: 0 0 12px var(--glow-color);
}

.theme-toggle {
    position: fixed;
    top: 1.5rem;
    right: 1.5rem;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    z-index: 1000;
    color: var(--toggle-icon-color);
    transition: color 0.3s ease;
}

.theme-toggle svg {
    width: 24px;
    height: 24px;
    fill: none;
    stroke: currentColor;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.scroll-container {
    height: 400vh;
}

.sticky-wrapper {
    position: sticky;
    top: 0;
    height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
}

.top-text {
    font-size: clamp(1.5rem, 5vw, 2.5rem);
    color: var(--text-secondary);
    white-space: nowrap;
    display: flex;
    justify-content: center;
    transition: color 0.3s ease;
}

.top-text .building-word {
    display: inline-block;
    white-space: nowrap;
    will-change: opacity, margin, width;
}

.adjective {
    font-size: clamp(1.5rem, 5vw, 2.5rem);
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    height: 1.4em;
    display: flex;
    align-items: center;
    justify-content: center;
    will-change: opacity, transform;
}

.main-text {
    font-size: clamp(1.8rem, 9vw, 5rem);
    white-space: nowrap;
    position: relative;
    display: flex;
    justify-content: center;
    will-change: transform, text-shadow;
}

.main-text span {
    display: inline-block;
    will-change: opacity, filter, margin;
    transition: none;
}

.fade {
    color: var(--text-muted);
    transition: color 0.3s ease;
}

.dot {
    color: var(--accent-primary);
    margin-left: 0;
    margin-right: 0;
    transition: color 0.3s ease;
}

.main-text.glow {
    text-shadow: 0 0 20px var(--glow-color);
}

.scroll-hint {
    position: absolute;
    bottom: 2rem;
    color: var(--text-muted);
    font-size: 0.875rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    animation: bounce 2s ease-in-out infinite;
    transition: opacity 0.3s ease-out, color 0.3s ease;
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
}

/* Modal Styles */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(8px);
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.4s ease;
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.9);
    background: var(--modal-bg);
    border: 1px solid var(--modal-border);
    border-radius: 1.5rem;
    padding: 2.5rem;
    z-index: 2001;
    max-width: 90vw;
    max-height: 90vh;
    overflow-y: auto;
    opacity: 0;
    visibility: hidden;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

.modal.active {
    opacity: 1;
    visibility: visible;
    transform: translate(-50%, -50%) scale(1);
}

.modal-close {
    position: absolute;
    top: 1.25rem;
    right: 1.25rem;
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 1.5rem;
    cursor: pointer;
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.modal-close:hover {
    color: var(--accent-primary);
    background: var(--modal-card-bg);
}

.modal-title {
    font-size: 1.75rem;
    font-weight: 600;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 2rem;
    text-align: center;
}

/* About Modal */
.about-modal {
    width: 1000px;
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.team-member {
    background: var(--modal-card-bg);
    border: 1px solid var(--modal-border);
    border-radius: 1rem;
    padding: 1.5rem;
    text-align: center;
    transition: all 0.3s ease;
}

.team-member:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 20px var(--glow-color);
    border-color: var(--accent-primary);
}

.team-photo {
    width: 120px;
    height: 120px;
    margin: 0 auto 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.team-photo img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.team-name {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.team-role {
    font-size: 0.875rem;
    color: var(--accent-primary);
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.team-focus {
    font-size: 0.85rem;
    color: var(--text-primary);
    font-weight: 500;
    margin-bottom: 1rem;
    line-height: 1.4;
    opacity: 0.9;
}

.team-bio {
    font-size: 0.8rem;
    color: var(--text-secondary);
    line-height: 1.6;
    text-align: left;
}

/* Contact Modal */
.contact-modal {
    width: 480px;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

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

.form-group label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.form-group input,
.form-group textarea {
    background: var(--input-bg);
    border: 1px solid var(--input-border);
    border-radius: 0.75rem;
    padding: 0.875rem 1rem;
    font-family: 'DM Sans', sans-serif;
    font-size: 0.9375rem;
    color: var(--text-primary);
    transition: all 0.3s ease;
    outline: none;
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px var(--glow-color);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.submit-btn {
    background: var(--accent-gradient);
    border: none;
    color: white;
    padding: 1rem 2rem;
    font-family: 'DM Sans', sans-serif;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 0.75rem;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-top: 0.5rem;
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px var(--glow-color);
}

.submit-btn:active {
    transform: translateY(0);
}

.submit-btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
}

.form-status {
    text-align: center;
    font-size: 0.875rem;
    margin-top: 0.75rem;
    min-height: 1.25rem;
}

.form-status.success {
    color: #22c55e;
}

.form-status.error {
    color: #ef4444;
}

/* Responsive */
@media (max-width: 900px) {
    .team-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .about-modal {
        width: 90vw;
        max-width: 400px;
    }

    .modal {
        padding: 1.5rem;
    }

    .nav-buttons {
        left: 50%;
        top: 1rem;
    }

    .nav-btn {
        padding: 0.4rem 1rem;
        font-size: 0.8rem;
    }
}