/**
 * Prashant Rana Portfolio — Base Styles
 * Reset, Typography, Utilities
 */

/* ============ Reset ============ */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: auto; /* Lenis handles smooth scrolling */
    -webkit-text-size-adjust: 100%;
    text-size-adjust: 100%;
}

body {
    font-family: var(--font-body);
    font-weight: var(--fw-regular);
    line-height: var(--lh-normal);
    color: var(--c-text-primary);
    background-color: var(--c-surface-deep);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
    overflow-x: hidden;
}

/* Prevent body scroll during loading */
body.is-loading {
    overflow: hidden;
}

/* ============ Typography ============ */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: var(--fw-bold);
    line-height: var(--lh-tight);
    letter-spacing: var(--ls-tight);
    color: var(--c-text-primary);
}

h1 { font-size: var(--fs-h1); }
h2 { font-size: var(--fs-h2); }
h3 { font-size: var(--fs-h3); }
h4 { font-size: var(--fs-h4); }

p {
    font-size: var(--fs-body);
    line-height: var(--lh-relaxed);
    color: var(--c-text-secondary);
}

a {
    color: var(--c-primary);
    text-decoration: none;
    transition: color var(--duration-base) var(--ease-out-quart);
}

a:hover {
    color: var(--c-primary-dim);
}

a:focus-visible {
    outline: 2px solid var(--c-primary);
    outline-offset: 3px;
    border-radius: var(--radius-sm);
}

img, video, svg {
    display: block;
    max-width: 100%;
    height: auto;
}

button {
    font-family: inherit;
    font-size: inherit;
    cursor: pointer;
    border: none;
    background: none;
    color: inherit;
}

button:focus-visible {
    outline: 2px solid var(--c-primary);
    outline-offset: 3px;
    border-radius: var(--radius-sm);
}

ul, ol {
    list-style: none;
}

input, textarea, select {
    font-family: inherit;
    font-size: inherit;
    color: inherit;
}

/* ============ Selection ============ */
::selection {
    background: var(--c-primary);
    color: var(--c-surface-deep);
}

/* ============ Scrollbar ============ */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--c-text-dim);
    border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--c-text-muted);
}

/* ============ Skip Link (Accessibility) ============ */
.skip-link {
    position: fixed;
    top: -100%;
    left: 50%;
    transform: translateX(-50%);
    padding: var(--space-sm) var(--space-lg);
    background: var(--c-primary);
    color: var(--c-surface-deep);
    font-weight: var(--fw-semibold);
    border-radius: 0 0 var(--radius-md) var(--radius-md);
    z-index: var(--z-loading);
    transition: top var(--duration-base) var(--ease-out-quart);
}

.skip-link:focus {
    top: 0;
}

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

.container--narrow {
    max-width: var(--container-narrow);
}

/* ============ Chapter Sections ============ */
.chapter {
    position: relative;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: var(--space-section) 0;
    overflow: hidden;
}

.chapter__inner {
    position: relative;
    z-index: var(--z-base);
}

/* ============ Section Headers ============ */
.section-label {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    font-family: var(--font-body);
    font-size: var(--fs-caption);
    font-weight: var(--fw-semibold);
    letter-spacing: var(--ls-wider);
    text-transform: uppercase;
    color: var(--c-primary);
    margin-bottom: var(--space-lg);
}

.section-label::before {
    content: '';
    display: block;
    width: 24px;
    height: 1px;
    background: var(--c-primary);
}

.section-title {
    font-size: var(--fs-h2);
    font-weight: var(--fw-bold);
    margin-bottom: var(--space-lg);
    background: linear-gradient(135deg, var(--c-text-primary) 0%, var(--c-text-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    font-size: var(--fs-body);
    color: var(--c-text-muted);
    max-width: 600px;
    line-height: var(--lh-relaxed);
}

/* ============ Glass Card ============ */
.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    box-shadow: var(--glass-shadow);
    transition:
        background var(--duration-base) var(--ease-out-quart),
        border-color var(--duration-base) var(--ease-out-quart),
        box-shadow var(--duration-base) var(--ease-out-quart),
        transform var(--duration-slow) var(--ease-out-expo);
}

.glass-card:hover {
    background: var(--glass-bg-hover);
    border-color: var(--glass-border-hover);
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

/* ============ Buttons ============ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: 0.85rem 2rem;
    font-family: var(--font-body);
    font-size: var(--fs-small);
    font-weight: var(--fw-semibold);
    letter-spacing: var(--ls-wide);
    border-radius: var(--radius-full);
    text-decoration: none;
    cursor: pointer;
    transition:
        all var(--duration-base) var(--ease-out-quart);
    position: relative;
    overflow: hidden;
}

.btn--primary {
    background: var(--c-primary);
    color: var(--c-surface-deep);
    border: none;
}

.btn--primary:hover {
    background: var(--c-primary-dim);
    box-shadow: var(--shadow-glow-primary);
    transform: translateY(-2px);
    color: var(--c-surface-deep);
}

.btn--outline {
    background: transparent;
    color: var(--c-text-primary);
    border: 1px solid var(--border-medium);
}

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

.btn--ghost {
    background: transparent;
    color: var(--c-text-secondary);
    border: none;
    padding: 0.5rem 1rem;
}

.btn--ghost:hover {
    color: var(--c-primary);
}

.btn__icon {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}

/* Magnetic button wrapper — JS adds transforms */
.magnetic-wrap {
    display: inline-block;
    position: relative;
}

/* ============ Tag / Badge ============ */
.tag {
    display: inline-flex;
    align-items: center;
    padding: 0.35rem 0.85rem;
    font-size: var(--fs-caption);
    font-weight: var(--fw-medium);
    letter-spacing: var(--ls-wide);
    border-radius: var(--radius-full);
    background: var(--c-primary-subtle);
    color: var(--c-primary);
    border: 1px solid rgba(45, 212, 191, 0.12);
}

.tag--secondary {
    background: var(--c-secondary-subtle);
    color: var(--c-secondary);
    border-color: rgba(245, 158, 11, 0.12);
}

.tag--tertiary {
    background: var(--c-tertiary-subtle);
    color: var(--c-tertiary);
    border-color: rgba(129, 140, 248, 0.12);
}

/* ============ Social Links ============ */
.social-links {
    display: flex;
    gap: var(--space-md);
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    border: 1px solid var(--border-light);
    color: var(--c-text-muted);
    transition:
        color var(--duration-base) var(--ease-out-quart),
        border-color var(--duration-base) var(--ease-out-quart),
        background var(--duration-base) var(--ease-out-quart);
}

.social-link:hover {
    color: var(--c-primary);
    border-color: var(--c-primary);
    background: var(--c-primary-subtle);
}

.social-link svg {
    width: 18px;
    height: 18px;
}

/* ============ Ambient Glow Layers ============ */
.ambient-glow {
    position: absolute;
    border-radius: 50%;
    filter: blur(120px);
    pointer-events: none;
    opacity: 0.15;
}

.ambient-glow--primary {
    background: var(--c-primary);
}

.ambient-glow--secondary {
    background: var(--c-secondary);
}

.ambient-glow--tertiary {
    background: var(--c-tertiary);
}

/* ============ Visibility Utilities ============ */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* Elements hidden until GSAP reveals them */
.will-reveal {
    opacity: 0;
    visibility: hidden;
}

/* Reduced motion: show everything immediately */
@media (prefers-reduced-motion: reduce) {
    .will-reveal {
        opacity: 1;
        visibility: visible;
    }

    .glass-card:hover {
        transform: none;
    }

    .btn--primary:hover,
    .btn--outline:hover {
        transform: none;
    }
}

/* ============ Loading Overlay ============ */
.loading-overlay {
    position: fixed;
    inset: 0;
    background: var(--c-surface-deep);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: var(--z-loading);
    transition: opacity 0.6s var(--ease-out-expo), visibility 0.6s;
}

.loading-overlay.is-hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.loader {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-lg);
}

.loader__ring {
    width: 48px;
    height: 48px;
    border: 2px solid var(--border-light);
    border-top-color: var(--c-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.loader__text {
    font-family: var(--font-display);
    font-size: var(--fs-small);
    font-weight: var(--fw-medium);
    letter-spacing: var(--ls-wider);
    text-transform: uppercase;
    color: var(--c-text-muted);
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ============ Custom Cursor ============ */
.cursor {
    position: fixed;
    top: 0;
    left: 0;
    width: 20px;
    height: 20px;
    border: 1.5px solid var(--c-primary);
    border-radius: 50%;
    pointer-events: none;
    z-index: var(--z-cursor);
    mix-blend-mode: difference;
    transition: width 0.3s var(--ease-out-expo),
                height 0.3s var(--ease-out-expo),
                border-color 0.3s;
    transform: translate(-50%, -50%);
}

.cursor.is-hovering {
    width: 50px;
    height: 50px;
    border-color: var(--c-secondary);
}

.cursor__dot {
    position: fixed;
    top: 0;
    left: 0;
    width: 4px;
    height: 4px;
    background: var(--c-primary);
    border-radius: 50%;
    pointer-events: none;
    z-index: var(--z-cursor);
    transform: translate(-50%, -50%);
}

/* Hide custom cursor on touch devices */
@media (hover: none) {
    .cursor,
    .cursor__dot {
        display: none;
    }
}

/* ============ Form Styles ============ */
.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.form-group label {
    font-size: var(--fs-small);
    font-weight: var(--fw-medium);
    color: var(--c-text-secondary);
}

.form-group .required {
    color: var(--c-primary);
}

.form-group input,
.form-group textarea,
.form-group select {
    padding: 0.85rem 1.15rem;
    background: var(--c-surface-raised);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    color: var(--c-text-primary);
    transition:
        border-color var(--duration-base) var(--ease-out-quart),
        box-shadow var(--duration-base) var(--ease-out-quart);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--c-primary);
    box-shadow: 0 0 0 3px var(--c-primary-subtle);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--c-text-dim);
}

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

.form-group select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    padding-right: 2.5rem;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-lg);
}

@media (max-width: 600px) {
    .form-row {
        grid-template-columns: 1fr;
    }
}

.form-message {
    padding: var(--space-md) var(--space-lg);
    border-radius: var(--radius-md);
    font-size: var(--fs-small);
    font-weight: var(--fw-medium);
    display: none;
}

.form-message.success {
    display: block;
    background: rgba(45, 212, 191, 0.1);
    color: var(--c-primary);
    border: 1px solid rgba(45, 212, 191, 0.2);
}

.form-message.error {
    display: block;
    background: rgba(239, 68, 68, 0.1);
    color: #ef4444;
    border: 1px solid rgba(239, 68, 68, 0.2);
}