/* ============================================================
    CSS CUSTOM PROPERTIES — Dark / Light theme tokens
    ============================================================ */
:root {
    --bg: #fafafa;
    --bg2: #f5f5f5;
    --surface: #ffffff;
    --surface2: #ebebeb;
    --accent: #171717;
    --accent2: #0070f3;
    --accent3: #7928ca;
    --text: #171717;
    --text-muted: #4d4d4d;
    --border: #ebebeb;
    --glow: 0px 1px 2px rgba(0,0,0,0.05), 0px 2px 4px rgba(0,0,0,0.05);
    --glow2: 0px 2px 4px rgba(0,0,0,0.06), 0px 8px 16px -8px rgba(0,0,0,0.06);
    --nav-h: 64px;
    --radius: 8px;
    --transition: 0.2s ease;
}

[data-theme="dark"] {
    --bg: #0a0a0a;
    --bg2: #111111;
    --surface: #000000;
    --surface2: #222222;
    --accent: #ffffff;
    --accent2: #0070f3;
    --accent3: #a855f7;
    --text: #ffffff;
    --text-muted: #888888;
    --border: #333333;
    --glow: 0px 1px 2px rgba(0,0,0,0.4);
    --glow2: 0px 2px 8px rgba(0,0,0,0.4);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    font-feature-settings: "ss01", "ss02";
    background: var(--bg);
    color: var(--text);
    overflow-x: hidden;
    transition: background 0.4s, color 0.4s;
}

::selection {
    background: var(--accent);
    color: var(--bg);
}

/* ============================================================
       PARTICLE CANVAS
       ============================================================ */
#bg-canvas {
    display: none;
}

/* ============================================================
       NAVIGATION BAR
       ============================================================ */
nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-h);
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 5%;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    transition: background 0.4s;
}

[data-theme="dark"] nav {
    background: rgba(10, 10, 10, 0.8);
}

.nav-logo {
    font-family: 'Inter', sans-serif;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--accent);
    text-decoration: none;
    letter-spacing: -0.5px;
    flex-shrink: 0;
}

.nav-logo span {
    color: var(--text-muted);
}

.nav-links {
    display: flex;
    gap: 1.5rem;
    list-style: none;
    align-items: center;
}

.nav-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    padding: 6px 12px;
    border-radius: 100px;
    transition: background-color 0.2s, color 0.2s;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--text);
    background-color: var(--bg2);
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.theme-btn {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 1px solid var(--border);
    background: var(--surface);
    cursor: pointer;
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
    color: var(--text);
}

.theme-btn:hover {
    border-color: var(--accent);
    box-shadow: var(--glow);
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    background: none;
    border: none;
    padding: 5px;
}

.hamburger span {
    width: 24px;
    height: 2px;
    background: var(--text);
    display: block;
    transition: all 0.2s;
}

.mobile-menu {
    display: none;
    position: fixed;
    top: var(--nav-h);
    left: 0;
    right: 0;
    background: var(--bg2);
    border-bottom: 1px solid var(--border);
    padding: 1.5rem 5%;
    z-index: 99;
    flex-direction: column;
    gap: 1.2rem;
}

.mobile-menu.open {
    display: flex;
}

.mobile-menu a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 1rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    transition: color 0.2s;
}

.mobile-menu a:hover {
    color: var(--accent);
}

/* ============================================================
       PAGE HERO
       ============================================================ */
.page-hero {
    padding-top: calc(var(--nav-h) + 5rem);
    padding-bottom: 4rem;
    padding-left: 5%;
    padding-right: 5%;
    position: relative;
    z-index: 1;
    max-width: 900px;
}

.page-label {
    font-family: 'JetBrains Mono', monospace;
    font-size: 12px;
    letter-spacing: -0.2px;
    text-transform: uppercase;
    color: var(--accent2);
    margin-bottom: 1rem;
}

.page-hero h1 {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 600;
    letter-spacing: -2px;
    line-height: 1.05;
    margin-bottom: 1.2rem;
    color: var(--text);
}

.page-hero h1 em {
    font-style: normal;
    color: var(--accent3);
}

.page-hero p {
    color: var(--text-muted);
    font-size: 1.1rem;
    line-height: 1.6;
    max-width: 580px;
}

.page-hero>* {
    animation: fadeUp 0.75s ease both;
}

.page-hero>*:nth-child(1) {
    animation-delay: 0.05s;
}

.page-hero>*:nth-child(2) {
    animation-delay: 0.15s;
}

.page-hero>*:nth-child(3) {
    animation-delay: 0.25s;
}

/* ============================================================
       CONTACT LAYOUT — two-column grid
       ============================================================ */
.contact-section {
    padding: 0 5% 8rem;
    position: relative;
    z-index: 1;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.6fr;
    gap: 3rem;
    max-width: 1100px;
    align-items: start;
}

/* ============================================================
       SIDE PANEL — info cards
       ============================================================ */
.contact-side {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.side-intro {
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.75;
}

.side-intro strong {
    color: var(--text);
    font-weight: 500;
}

/* Info card */
.info-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.3rem 1.5rem;
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
}

.info-card:hover {
    border-color: var(--accent);
    box-shadow: var(--glow2);
    transform: translateX(4px);
}

.info-icon {
    width: 42px;
    height: 42px;
    border-radius: 8px;
    background: var(--bg2);
    border: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    flex-shrink: 0;
    transition: background var(--transition);
}

.info-card:hover .info-icon {
    background: var(--border);
}

.info-text {
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
}

.info-label {
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
    letter-spacing: -0.2px;
    text-transform: uppercase;
    color: var(--text-muted);
}

.info-value {
    font-size: 14px;
    font-weight: 500;
    color: var(--text);
}

.info-value a {
    color: var(--text);
    text-decoration: none;
    transition: color var(--transition);
}

.info-value a:hover {
    color: var(--accent2);
}

/* Availability badge */
.avail-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
    letter-spacing: -0.2px;
    text-transform: uppercase;
    color: var(--accent);
    border: 1px solid var(--border);
    border-radius: 100px;
    padding: 6px 12px;
    background: var(--bg2);
    width: fit-content;
}

.avail-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--accent);
    animation: pulse 2s infinite;
}

/* Social row */
.social-row {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.social-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 6px 16px;
    border: 1px solid var(--border);
    border-radius: 100px;
    background: var(--surface);
    color: var(--text-muted);
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
    letter-spacing: -0.2px;
    text-decoration: none;
    text-transform: uppercase;
    transition: all var(--transition);
    cursor: pointer;
}

.social-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
    box-shadow: var(--glow2);
    transform: translateY(-2px);
}

/* ============================================================
       CONTACT FORM CARD
       ============================================================ */
.form-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 2.8rem;
    position: relative;
    overflow: hidden;
}

.form-header {
    margin-bottom: 2rem;
}

.form-header h2 {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    font-size: 1.5rem;
    font-weight: 600;
    letter-spacing: -0.6px;
    margin-bottom: 0.4rem;
    color: var(--text);
}

.form-header p {
    font-size: 14px;
    color: var(--text-muted);
}

/* ---- Field groups ---- */
.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.2rem;
    margin-bottom: 1.2rem;
}

.field-group {
    display: flex;
    flex-direction: column;
    gap: 0.45rem;
    margin-bottom: 1.2rem;
}

.field-group:last-of-type {
    margin-bottom: 0;
}

/* Label */
.field-label {
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
    letter-spacing: -0.2px;
    text-transform: uppercase;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 0.35rem;
}

.field-label .required-star {
    color: #ee0000;
    font-size: 0.8rem;
    line-height: 1;
}

/* Input / textarea wrapper */
.input-wrap {
    position: relative;
}

/* Base input styles */
.field-input,
.field-textarea {
    width: 100%;
    height: 40px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 0 12px;
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    font-size: 14px;
    color: var(--text);
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s, background 0.2s;
    -webkit-appearance: none;
    appearance: none;
}

.field-input::placeholder,
.field-textarea::placeholder {
    color: var(--text-muted);
    opacity: 0.6;
    font-size: 14px;
}

/* Focus ring */
.field-input:focus,
.field-textarea:focus {
    border-color: var(--accent);
}

/* Error state */
.field-input.error,
.field-textarea.error {
    border-color: #ee0000;
}

/* Valid state */
.field-input.valid,
.field-textarea.valid {
    border-color: var(--accent);
}

.field-textarea {
    resize: vertical;
    min-height: 130px;
    height: auto;
    padding: 12px;
    line-height: 1.65;
}

/* Character counter */
.char-counter {
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
    color: var(--text-muted);
    text-align: right;
    margin-top: 0.3rem;
    transition: color 0.2s;
}

.char-counter.warn {
    color: var(--accent3);
}

.char-counter.ok {
    color: var(--accent);
}

/* Inline field error message */
.field-error {
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
    color: #ee0000;
    letter-spacing: -0.2px;
    display: flex;
    align-items: center;
    gap: 0.35rem;
    min-height: 18px;
    opacity: 0;
    transform: translateY(-4px);
    transition: opacity 0.2s, transform 0.2s;
    pointer-events: none;
}

.field-error.visible {
    opacity: 1;
    transform: translateY(0);
}

.field-error svg {
    flex-shrink: 0;
}

/* ---- Submit button ---- */
.form-footer {
    margin-top: 1.8rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.btn-submit {
    position: relative;
    overflow: hidden;
    width: 100%;
    height: 48px;
    border-radius: 100px;
    background: var(--accent);
    color: var(--bg);
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    font-weight: 500;
    font-size: 0.95rem;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.6rem;
    transition: background 0.2s, transform 0.2s, box-shadow 0.2s;
}

.btn-submit:hover {
    background: var(--text-muted);
    box-shadow: var(--glow2);
}

.btn-submit:active {
    transform: scale(0.98);
}

.btn-submit:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

/* Sending spinner inside button */
.btn-submit .spinner {
    width: 18px;
    height: 18px;
    border: 2px solid rgba(255, 255, 255, 0.25);
    border-top-color: var(--bg);
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
    display: none;
}

.btn-submit.sending .spinner {
    display: block;
}

.btn-submit.sending .btn-text {
    display: none;
}

.btn-submit.sending .btn-icon {
    display: none;
}

.form-note {
    font-size: 13px;
    color: var(--text-muted);
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
}

.form-note svg {
    color: var(--text-muted);
}

/* ============================================================
       SUCCESS MESSAGE
       ============================================================ */
.success-msg {
    display: none;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 3rem 2rem;
    gap: 1rem;
    animation: fadeUp 0.5s ease;
}

.success-msg.show {
    display: flex;
}

.success-icon-wrap {
    width: 72px;
    height: 72px;
    border-radius: 50%;
    background: var(--bg2);
    border: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    animation: popIn 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.success-icon-wrap svg {
    color: var(--accent);
}

.success-msg h3 {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    font-size: 1.6rem;
    font-weight: 600;
    letter-spacing: -0.6px;
    color: var(--text);
}

.success-msg p {
    color: var(--text-muted);
    font-size: 14px;
    max-width: 360px;
    line-height: 1.6;
}

.btn-reset {
    margin-top: 0.5rem;
    padding: 0px 24px;
    height: 40px;
    border-radius: 100px;
    background: transparent;
    color: var(--text);
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    font-weight: 500;
    font-size: 14px;
    border: 1px solid var(--border);
    cursor: pointer;
    transition: all var(--transition);
}

.btn-reset:hover {
    border-color: var(--accent);
    color: var(--accent);
    box-shadow: var(--glow2);
}

/* ============================================================
       FAQ / EXTRA INFO SECTION
       ============================================================ */
.info-section {
    padding: 0 5% 7rem;
    position: relative;
    z-index: 1;
}

.info-section-inner {
    max-width: 1100px;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 1.5rem;
}

.info-feature-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.8rem;
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
}

.info-feature-card:hover {
    border-color: var(--accent);
    transform: translateY(-4px);
    box-shadow: var(--glow2);
}

.feature-num {
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
    letter-spacing: -0.2px;
    color: var(--accent2);
    margin-bottom: 1rem;
    text-transform: uppercase;
}

.feature-title {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    font-size: 1.05rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text);
}

.feature-desc {
    font-size: 0.875rem;
    color: var(--text-muted);
    line-height: 1.7;
}

/* ============================================================
       FOOTER
       ============================================================ */
footer {
    padding: 2.5rem 5%;
    text-align: center;
    border-top: 1px solid var(--border);
    color: var(--text-muted);
    font-size: 0.85rem;
    position: relative;
    z-index: 1;
}

footer span {
    color: var(--accent);
}

/* ============================================================
       SCROLL REVEAL
       ============================================================ */
.reveal {
    opacity: 0;
    transform: translateY(36px);
    transition: opacity 0.65s ease, transform 0.65s ease;
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ============================================================
       KEYFRAMES
       ============================================================ */
@keyframes fadeUp {
    from {
        opacity: 0;
        transform: translateY(28px);
    }

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

@keyframes pulse {

    0%,
    100% {
        opacity: 1;
        transform: scale(1);
    }

    50% {
        opacity: 0.45;
        transform: scale(0.8);
    }
}

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

@keyframes popIn {
    from {
        transform: scale(0.5);
        opacity: 0;
    }

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

@keyframes shakeX {

    0%,
    100% {
        transform: translateX(0);
    }

    20%,
    60% {
        transform: translateX(-6px);
    }

    40%,
    80% {
        transform: translateX(6px);
    }
}

.shake {
    animation: shakeX 0.4s ease;
}

/* ============================================================
       RESPONSIVE
       ============================================================ */
@media (max-width: 900px) {
    .contact-grid {
        grid-template-columns: 1fr;
    }

    .contact-side {
        order: 2;
    }

    .form-card-wrap {
        order: 1;
    }
}

@media (max-width: 640px) {
    .form-row {
        grid-template-columns: 1fr;
    }

    .form-card {
        padding: 2rem 1.5rem;
    }

    .nav-links {
        display: none;
    }

    .hamburger {
        display: flex;
    }

    .page-hero {
        padding-top: calc(var(--nav-h) + 3rem);
    }

    .page-hero h1 {
        letter-spacing: -1px;
    }
}