:root {
    /* Transitions */
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-smooth: 0.4s cubic-bezier(0.4, 0, 0.2, 1);

    /* Animation Values */
    --font-sans: 'Outfit', sans-serif;

    /* Fluid Spacing & Sizes */
    --container-max-width: 1100px;
    --container-padding: clamp(1.25rem, 5vw, 3rem);
    --hero-margin-top: clamp(4rem, 12vh, 10rem);
    --hero-margin-bottom: clamp(3rem, 8vh, 6rem);
}

/* --- Theme Variables --- */
:root[data-theme='light'] {
    --bg-color: #f8fafc;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --surface: rgba(255, 255, 255, 0.5);
    --surface-hover: rgba(255, 255, 255, 0.8);
    --border: rgba(15, 23, 42, 0.08);
    --border-hover: rgba(15, 23, 42, 0.15);
    --accent-purple: #7c3aed;
    --accent-blue: #2563eb;
    --accent-teal: #0d9488;
    --glow-opacity: 0.08;
    --card-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.05);
}

:root[data-theme='dark'] {
    --bg-color: #030712;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --surface: rgba(17, 24, 39, 0.4);
    --surface-hover: rgba(30, 41, 59, 0.6);
    --border: rgba(255, 255, 255, 0.06);
    --border-hover: rgba(255, 255, 255, 0.12);
    --accent-purple: #a78bfa;
    --accent-blue: #60a5fa;
    --accent-teal: #2dd4bf;
    --glow-opacity: 0.15;
    --card-shadow: 0 20px 50px -12px rgba(0, 0, 0, 0.5);
}

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

body {
    font-family: var(--font-sans);
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    transition: background-color var(--transition-smooth);
}

/* --- Background Effects --- */
.background-effects {
    position: fixed;
    inset: 0;
    z-index: -1;
    pointer-events: none;
}

.glow {
    position: absolute;
    width: 60vw;
    height: 60vh;
    border-radius: 50%;
    filter: blur(100px);
    opacity: var(--glow-opacity);
    animation: float 20s ease-in-out infinite alternate;
    transition: opacity var(--transition-smooth);
}

.glow-purple {
    top: -20%;
    left: -10%;
    background: var(--accent-purple);
}

.glow-blue {
    bottom: -10%;
    right: -10%;
    background: var(--accent-blue);
    animation-delay: -10s;
}

@keyframes float {
    0% {
        transform: translate(0, 0) scale(1);
    }

    100% {
        transform: translate(5%, 10%) scale(1.1);
    }
}

.noise-overlay {
    position: absolute;
    inset: 0;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
    opacity: 0.03;
    mix-blend-mode: overlay;
}

/* --- Layout --- */
.container {
    width: 100%;
    max-width: var(--container-max-width);
    margin-inline: auto;
    padding-inline: var(--container-padding);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* --- Header Tools (Theme Toggle) --- */
.header-tools {
    display: flex;
    justify-content: flex-end;
    padding-block: clamp(1.5rem, 4vh, 3rem);
}

.theme-btn {
    background: var(--surface);
    border: 1px solid var(--border);
    width: 44px;
    height: 44px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--text-primary);
    backdrop-filter: blur(10px);
    transition: all var(--transition-fast);
}

.theme-btn:hover {
    background: var(--surface-hover);
    transform: scale(1.05);
}

.sun-icon,
.moon-icon {
    position: absolute;
    width: 18px;
    height: 18px;
    transition: transform var(--transition-smooth), opacity var(--transition-smooth);
}

[data-theme='dark'] .sun-icon {
    opacity: 1;
    transform: rotate(0);
}

[data-theme='dark'] .moon-icon {
    opacity: 0;
    transform: rotate(90deg);
}

[data-theme='light'] .sun-icon {
    opacity: 0;
    transform: rotate(-90deg);
}

[data-theme='light'] .moon-icon {
    opacity: 1;
    transform: rotate(0);
}

/* --- Hero Section --- */
.hero {
    margin-block-start: var(--hero-margin-top);
    margin-block-end: var(--hero-margin-bottom);
    max-width: 800px;
    /* Aligned for better line length */
    text-align: left;
}

.hero-title {
    font-size: clamp(2.25rem, 8vw, 4.5rem);
    font-weight: 700;
    line-height: 1.05;
    letter-spacing: -0.04em;
    margin-block-end: 1.5rem;
}

.gradient-text {
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--text-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: clamp(1rem, 2.5vw, 1.15rem);
    color: var(--text-secondary);
    line-height: 1.55;
    font-weight: 400;
    max-width: 60ch;
    /* Optimal character count per line */
}

/* --- Projects Grid --- */
.projects-section {
    width: 100%;
    padding-block-end: clamp(3rem, 10vh, 6rem);
}

.projects-grid {
    display: grid;
    /* Improved Grid Logic: dynamic minimum width */
    grid-template-columns: repeat(auto-fill, minmax(clamp(260px, 30vw, 320px), 1fr));
    gap: 1.5rem;
}

.project-card {
    position: relative;
    text-decoration: none;
    color: inherit;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: clamp(1.5rem, 3vw, 2rem);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    transition: all var(--transition-smooth);
    box-shadow: var(--card-shadow);
}

.project-card:hover {
    transform: translateY(-8px);
    background: var(--surface-hover);
    border-color: var(--border-hover);
    box-shadow: 0 30px 60px -12px rgba(0, 0, 0, 0.2);
}

.card-inner {
    position: relative;
    z-index: 2;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.card-glow {
    position: absolute;
    inset: 0;
    background: radial-gradient(400px circle at var(--mouse-x, 0) var(--mouse-y, 0),
            rgba(255, 255, 255, 0.08),
            transparent 40%);
    opacity: 0;
    transition: opacity 0.3s;
    pointer-events: none;
    z-index: 1;
}

.project-card:hover .card-glow {
    opacity: 1;
}

.icon-wrapper {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-block-end: 1.25rem;
}

.icon-purple {
    background: rgba(124, 58, 237, 0.1);
    color: var(--accent-purple);
}

.icon-blue {
    background: rgba(37, 99, 235, 0.1);
    color: var(--accent-blue);
}

.icon-teal {
    background: rgba(13, 148, 136, 0.1);
    color: var(--accent-teal);
}

.project-card h3 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-block-end: 0.5rem;
    letter-spacing: -0.02em;
}

.project-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.5;
    margin-block-end: 2rem;
    flex: 1;
}

.card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
    border-top: 1px solid var(--border);
    padding-block-start: 1.25rem;
    transition: color 0.3s;
}

.arrow {
    width: 14px;
    height: 14px;
    transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.project-card:hover .arrow {
    transform: translate(3px, -3px);
}

.project-card:hover .card-footer {
    color: var(--text-primary);
}

/* --- Footer --- */
footer {
    padding-block: 3rem;
    text-align: left;
    color: var(--text-secondary);
    font-size: 0.85rem;
}

/* --- Animations --- */
.slide-up {
    animation: slideUp 0.8s cubic-bezier(0.2, 0.8, 0.2, 1) forwards;
}

.fade-in {
    opacity: 0;
    animation: fadeIn 1s ease-out 0.2s forwards;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

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

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

/* --- Responsive & Alignment Audit --- */
@media (max-width: 640px) {
    .hero-title {
        font-size: 2.5rem;
    }

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

    .hero {
        margin-block-start: 4rem;
    }
}

/* Ultra-wide alignment ensure */
@media (min-width: 1400px) {
    .container {
        max-width: 1200px;
    }
}