/* ========================================
   CSS Variables & Design System
   ======================================== */
:root {
    /* Colors - Light Theme (default) */
    --color-bg-primary: #f7f2e9;
    --color-bg-secondary: #efe4d4;
    --color-bg-card: #fbf6ed;
    --color-text-primary: #1f1b16;
    --color-text-secondary: #5f564b;
    --color-accent: #c2573f;
    --color-accent-hover: #a74835;
    --color-accent-2: #1b6f6a;
    --color-accent-3: #3d6fa6;
    --color-border: rgba(31, 27, 22, 0.18);
    --color-border-strong: rgba(31, 27, 22, 0.28);
    --color-shadow: rgba(31, 27, 22, 0.12);

    /* Gradients */
    --gradient-accent: linear-gradient(120deg, #c2573f 0%, #d8a24c 100%);
    --gradient-card: linear-gradient(135deg, rgba(194, 87, 63, 0.08) 0%, rgba(27, 111, 106, 0.08) 100%);

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2.25rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;

    /* Typography */
    --font-primary: 'Space Grotesk', 'Helvetica Neue', Arial, sans-serif;
    --font-display: 'Fraunces', 'Times New Roman', serif;
    --font-mono: 'IBM Plex Mono', 'SFMono-Regular', Menlo, monospace;
    --font-size-xs: 0.85rem;
    --font-size-sm: 1rem;
    --font-size-md: 1.125rem;
    --font-size-lg: 1.5rem;
    --font-size-xl: 2.25rem;
    --font-size-2xl: 3.25rem;
    --font-size-3xl: 4.5rem;

    /* Effects */
    --border-radius-sm: 0.5rem;
    --border-radius-md: 0.9rem;
    --border-radius-lg: 1.4rem;
    --shadow-sm: 0 8px 20px rgba(31, 27, 22, 0.1);
    --shadow-md: 0 16px 32px rgba(31, 27, 22, 0.14);

    /* Transitions */
    --transition-fast: 0.18s ease;
    --transition-medium: 0.3s ease;
    --transition-slow: 0.5s ease;
}

[data-theme="dark"] {
    /* Colors - Dark Theme */
    --color-bg-primary: #14110e;
    --color-bg-secondary: #1c1712;
    --color-bg-card: #1f1b16;
    --color-text-primary: #f1e7d6;
    --color-text-secondary: #c2b5a3;
    --color-accent: #d26a4d;
    --color-accent-hover: #e08563;
    --color-accent-2: #5fb0a7;
    --color-accent-3: #6da7e0;
    --color-border: rgba(241, 231, 214, 0.18);
    --color-border-strong: rgba(241, 231, 214, 0.3);
    --color-shadow: rgba(0, 0, 0, 0.45);
    --gradient-card: linear-gradient(135deg, rgba(210, 106, 77, 0.1) 0%, rgba(95, 176, 167, 0.12) 100%);
}

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

html {
    scroll-behavior: smooth;
    height: 100%;
}

body {
    font-family: var(--font-primary);
    background-color: var(--color-bg-primary);
    background-attachment: fixed;
    color: var(--color-text-primary);
    line-height: 1.65;
    height: 100%;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    position: relative;
    transition: background-color var(--transition-medium), color var(--transition-medium);
}

[data-theme="dark"] body {
    background-color: var(--color-bg-primary);
}

body::before {
    content: '';
    position: fixed;
    inset: 0;
    pointer-events: none;
    background-image:
        repeating-linear-gradient(0deg, rgba(31, 27, 22, 0.02) 0 1px, transparent 1px 8px),
        repeating-linear-gradient(90deg, rgba(31, 27, 22, 0.015) 0 1px, transparent 1px 10px);
    opacity: 0.25;
    z-index: 0;
}

[data-theme="dark"] body::before {
    background-image:
        repeating-linear-gradient(0deg, rgba(241, 231, 214, 0.02) 0 1px, transparent 1px 8px),
        repeating-linear-gradient(90deg, rgba(241, 231, 214, 0.015) 0 1px, transparent 1px 10px);
    opacity: 0.15;
}

/* ========================================
   Typography
   ======================================== */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-display);
    font-weight: 600;
    line-height: 1.1;
    letter-spacing: -0.015em;
}

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

/* ========================================
   Layout
   ======================================== */
.container {
    max-width: 1120px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    width: 100%;
}

main {
    flex: 1;
    min-height: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: clamp(1.5rem, 4vw, 3rem) 0;
    position: relative;
    z-index: 1;
    overflow: hidden;
}

/* ========================================
   Hero Section
   ======================================== */
.hero {
    display: grid;
    grid-template-columns: minmax(280px, 1.1fr) minmax(260px, 0.9fr);
    gap: clamp(1.5rem, 4vw, 3rem);
    align-items: center;
    text-align: left;
}

.hero__content {
    max-width: 560px;
}

.theme-toggle {
    position: fixed;
    top: var(--spacing-md);
    right: var(--spacing-md);
    width: 46px;
    height: 46px;
    border: 2px solid var(--color-text-primary);
    border-radius: 12px;
    background: var(--color-bg-card);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    transition: transform var(--transition-medium), box-shadow var(--transition-medium), border-color var(--transition-medium), background-color var(--transition-medium);
    box-shadow: 4px 4px 0 var(--color-shadow);
    z-index: 10;
    overflow: hidden;
}

.theme-toggle:hover {
    border-color: var(--color-accent);
    transform: translate(-2px, -2px) rotate(5deg);
    box-shadow: 6px 6px 0 var(--color-shadow);
    background: linear-gradient(45deg, transparent 30%, rgba(194, 87, 63, 0.1) 50%, transparent 70%);
}

.theme-toggle:active {
    transform: translate(-1px, -1px) rotate(-2deg);
    box-shadow: 5px 5px 0 var(--color-shadow);
}

.theme-toggle__icon {
    position: absolute;
    width: 22px;
    height: 22px;
    transition: all var(--transition-slow) cubic-bezier(0.4, 0, 0.2, 1);
    color: var(--color-text-primary);
}

.theme-toggle__icon svg {
    width: 100%;
    height: 100%;
    fill: currentColor;
}

.theme-toggle__icon--sun {
    opacity: 1;
    transform: rotate(0deg) scale(1);
}

.theme-toggle__icon--moon {
    opacity: 0;
    transform: rotate(-90deg) scale(0.5);
}

[data-theme="dark"] .theme-toggle__icon--sun {
    opacity: 0;
    transform: rotate(90deg) scale(0.5);
}

[data-theme="dark"] .theme-toggle__icon--moon {
    opacity: 1;
    transform: rotate(0deg) scale(1);
}

@keyframes riseIn {
    from {
        opacity: 0;
        transform: translateY(24px) scale(0.98);
    }

    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(24px) scale(0.98);
    }

    to {
        opacity: 1;
        transform: translateX(0) scale(1);
    }
}

.hero__content > * {
    opacity: 0;
    animation: riseIn 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94) forwards;
}

.hero__content > *:nth-child(1) {
    animation-delay: 0.1s;
}

.hero__content > *:nth-child(2) {
    animation-delay: 0.2s;
}

.hero__content > *:nth-child(3) {
    animation-delay: 0.3s;
}

.hero__title {
    font-size: clamp(2.4rem, 6vw, 4.6rem);
    margin-bottom: 0.6rem;
    font-weight: 700;
    color: var(--color-accent);
    text-shadow: 0 8px 16px rgba(194, 87, 63, 0.15);
    display: inline-block;
    transition: transform var(--transition-medium), color var(--transition-medium);
}

.hero__title:hover {
    transform: translateY(-2px);
    color: var(--color-accent-hover);
}

[data-theme="dark"] .hero__title {
    text-shadow: 0 10px 20px rgba(210, 106, 77, 0.25);
}

[data-theme="dark"] .hero__title:hover {
    text-shadow: 0 12px 24px rgba(210, 106, 77, 0.35);
}

.hero__subtitle {
    font-size: 0.95rem;
    text-transform: uppercase;
    letter-spacing: 0.25em;
    color: var(--color-text-secondary);
    margin-bottom: 1.25rem;
    font-weight: 500;
}

.hero__description {
    font-size: var(--font-size-md);
    color: var(--color-text-secondary);
    line-height: 1.75;
}

/* ========================================
   Social Links Grid
   ======================================== */
.social-links {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    counter-reset: social;
}

.social-card {
    position: relative;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border-strong);
    border-radius: var(--border-radius-md);
    padding: 0.95rem 1.1rem 0.95rem 3rem;
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    transition: transform var(--transition-slow), box-shadow var(--transition-slow), border-color var(--transition-slow), background-color var(--transition-medium);
    box-shadow: 10px 10px 0 var(--color-shadow);
    overflow: hidden;
    cursor: pointer;
    isolation: isolate;
    opacity: 0;
    animation: slideIn 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94) forwards;
}

.social-card::before {
    counter-increment: social;
    content: counter(social, decimal-leading-zero);
    position: absolute;
    left: 1rem;
    top: 1.15rem;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    letter-spacing: 0.08em;
    color: var(--color-text-secondary);
    z-index: 1;
}

.social-card::after {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    width: 6px;
    background: var(--color-accent);
    opacity: 0.8;
    z-index: 0;
    transition: opacity var(--transition-medium);
}

.social-card:nth-child(1) {
    animation-delay: 0.25s;
}

.social-card:nth-child(2) {
    animation-delay: 0.35s;
}

.social-card:nth-child(3) {
    animation-delay: 0.45s;
}

.social-card:hover {
    transform: translate(-4px, -4px) scale(1.02);
    border-color: var(--color-accent);
    box-shadow: 16px 16px 0 var(--color-shadow);
}

.social-card:hover::after {
    opacity: 1;
}

.social-card__icon {
    width: 44px;
    height: 44px;
    min-width: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px solid var(--color-text-primary);
    border-radius: var(--border-radius-sm);
    background: var(--color-bg-secondary);
    color: var(--color-accent-2);
    transition: transform var(--transition-slow), border-color var(--transition-slow), color var(--transition-slow), background-color var(--transition-medium);
    position: relative;
    z-index: 1;
}

.social-card:nth-child(2) .social-card__icon {
    color: var(--color-accent);
    border-color: var(--color-accent);
}

.social-card:nth-child(3) .social-card__icon {
    color: var(--color-accent-3);
    border-color: var(--color-accent-3);
}

.social-card:hover .social-card__icon {
    transform: rotate(-8deg) scale(1.08);
    filter: drop-shadow(0 4px 8px rgba(194, 87, 63, 0.2));
}

.social-card__icon svg {
    width: 22px;
    height: 22px;
    fill: currentColor;
}

.social-card__content {
    flex: 1;
    min-width: 0;
    overflow: hidden;
    position: relative;
    z-index: 1;
}

.social-card__title {
    font-size: var(--font-size-md);
    font-weight: 600;
    margin-bottom: 0.25rem;
    color: var(--color-text-primary);
}

.social-card__handle {
    font-size: var(--font-size-xs);
    color: var(--color-text-secondary);
    font-family: var(--font-mono);
    word-break: break-word;
    overflow-wrap: break-word;
    max-width: 100%;
    letter-spacing: 0.02em;
}

.social-card__arrow {
    width: 18px;
    height: 18px;
    opacity: 0.7;
    transform: translateX(0);
    transition: transform var(--transition-slow), opacity var(--transition-slow), color var(--transition-slow);
    color: var(--color-text-secondary);
    position: relative;
    z-index: 1;
}

.social-card:hover .social-card__arrow {
    opacity: 1;
    transform: translateX(6px) scale(1.1);
    color: var(--color-accent);
}

.social-card__arrow svg {
    width: 100%;
    height: 100%;
    fill: currentColor;
}

/* ========================================
   Footer
   ======================================== */
.footer {
    position: relative;
    z-index: 1;
    text-align: center;
    padding: 0.75rem var(--spacing-lg) 1rem;
    color: var(--color-text-secondary);
    font-size: var(--font-size-xs);
    border-top: 1px solid var(--color-border);
    background: transparent;
    flex-shrink: 0;
}

/* ========================================
   Responsive Design
   ======================================== */
@media (max-width: 900px) {
    main {
        padding-top: 2.5rem;
    }

    .hero {
        grid-template-columns: 1fr;
    }

    .hero__content {
        max-width: 100%;
    }

    .social-links {
        max-width: 520px;
    }
}

@media (max-width: 600px) {
    .container {
        padding: 0 var(--spacing-md);
    }

    .theme-toggle {
        top: var(--spacing-sm);
        right: var(--spacing-sm);
        width: 40px;
        height: 40px;
        border-radius: 10px;
    }

    .theme-toggle__icon {
        width: 18px;
        height: 18px;
    }

    .hero__subtitle {
        letter-spacing: 0.18em;
    }

    .hero__title {
        font-size: clamp(2.1rem, 9vw, 3.4rem);
    }

    .social-card {
        padding: 0.9rem 0.95rem 0.9rem 2.6rem;
        box-shadow: 7px 7px 0 var(--color-shadow);
    }

    .social-card::before {
        left: 0.75rem;
    }

    .social-card__icon {
        width: 40px;
        height: 40px;
        min-width: 40px;
    }

    .social-card__icon svg {
        width: 20px;
        height: 20px;
    }
}

@media (max-height: 700px) {
    main {
        padding: 1rem 0;
    }

    .hero {
        gap: 1.25rem;
    }

    .hero__description {
        font-size: 1rem;
    }

    .social-links {
        gap: 0.6rem;
    }

    .social-card {
        padding: 0.8rem 0.9rem 0.8rem 2.6rem;
    }

    .footer {
        padding: 0.5rem var(--spacing-lg) 0.75rem;
    }
}

/* ========================================
   Accessibility
   ======================================== */
@media (prefers-reduced-motion: reduce) {

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus styles for keyboard navigation */
.social-card:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 3px;
}