:root {
    --gold: #D4AF37;
    --gold-soft: #E8C766;
    --gold-glow: rgba(212, 175, 55, 0.15);

    --tg-bg: var(--tg-theme-bg-color, #0F1117);
    --tg-text: var(--tg-theme-text-color, #FFFFFF);
    --tg-hint: var(--tg-theme-hint-color, #8B92A5);
    --tg-link: var(--tg-theme-link-color, #D4AF37);
    --tg-secondary-bg: var(--tg-theme-secondary-bg-color, #1A1D27);
    --tg-section-bg: var(--tg-theme-section-bg-color, #1A1D27);
    --tg-section-separator: var(--tg-theme-section-separator-color, rgba(255,255,255,0.06));

    --accent: var(--gold);
    --accent-text: #1A1D27;

    --radius: 16px;
    --radius-sm: 12px;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 24px rgba(0, 0, 0, 0.08);

    --transition: 200ms cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

html, body {
    height: 100%;
    overflow-x: hidden;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Segoe UI', Roboto, sans-serif;
    background: var(--tg-bg);
    color: var(--tg-text);
    font-size: 16px;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

#app {
    max-width: 520px;
    margin: 0 auto;
    padding: 20px 16px 40px;
    min-height: 100vh;
}

/* ===== Header ===== */
.app-header {
    text-align: center;
    padding: 16px 0 28px;
}

.logo-container {
    display: flex;
    justify-content: center;
    margin-bottom: 14px;
}

.app-logo {
    width: 96px;
    height: 96px;
    object-fit: contain;
    border-radius: 50%;
    box-shadow: 0 8px 24px rgba(212, 175, 55, 0.25);
}

.logo-dark { display: none; }

[data-theme="dark"] .logo-light { display: none; }
[data-theme="dark"] .logo-dark { display: block; }

.app-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--tg-text);
    margin-bottom: 4px;
    letter-spacing: -0.3px;
}

.app-subtitle {
    font-size: 14px;
    color: var(--tg-hint);
    font-weight: 400;
}

/* ===== Menu Cards ===== */
.menu {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-top: 8px;
}

.menu-btn {
    display: flex;
    align-items: center;
    gap: 14px;
    width: 100%;
    padding: 16px 18px;
    background: var(--tg-section-bg);
    border: 1px solid var(--tg-section-separator);
    border-radius: var(--radius);
    color: var(--tg-text);
    font-size: 16px;
    font-family: inherit;
    cursor: pointer;
    transition: transform var(--transition), background var(--transition), border-color var(--transition);
    text-align: left;
}

.menu-btn:active {
    transform: scale(0.98);
    background: var(--gold-glow);
    border-color: var(--gold);
}

.menu-icon-wrap {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    border-radius: 12px;
    background: var(--gold-glow);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gold);
}

.menu-icon-wrap svg {
    width: 20px;
    height: 20px;
}

.menu-content {
    flex: 1;
    min-width: 0;
}

.menu-label {
    display: block;
    font-weight: 600;
    font-size: 15px;
    color: var(--tg-text);
    margin-bottom: 2px;
}

.menu-hint {
    font-size: 12px;
    color: var(--tg-hint);
    line-height: 1.3;
}

.menu-chevron {
    flex-shrink: 0;
    color: var(--tg-hint);
    opacity: 0.5;
}

.menu-chevron svg {
    width: 16px;
    height: 16px;
}

/* ===== Pages ===== */
.page {
    animation: pageEnter 280ms cubic-bezier(0.16, 1, 0.3, 1);
}

.page.hidden,
#page-menu.hidden {
    display: none;
}

@keyframes pageEnter {
    from {
        opacity: 0;
        transform: translateY(12px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.page-title {
    font-size: 22px;
    font-weight: 700;
    color: var(--tg-text);
    margin-bottom: 6px;
    letter-spacing: -0.3px;
}

.page-subtitle {
    font-size: 14px;
    color: var(--tg-hint);
    margin-bottom: 22px;
}

/* ===== Form Fields ===== */
.form-stack {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.field-label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    color: var(--tg-hint);
    margin-bottom: 6px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

textarea,
input[type="text"],
input[type="tel"],
input[type="email"] {
    width: 100%;
    padding: 14px 16px;
    background: var(--tg-section-bg);
    border: 1px solid var(--tg-section-separator);
    border-radius: var(--radius-sm);
    color: var(--tg-text);
    font-size: 15px;
    font-family: inherit;
    line-height: 1.4;
    resize: none;
    transition: border-color var(--transition), background var(--transition);
}

textarea {
    min-height: 100px;
    line-height: 1.5;
}

textarea::placeholder,
input::placeholder {
    color: var(--tg-hint);
    opacity: 0.7;
}

textarea:focus,
input:focus {
    outline: none;
    border-color: var(--gold);
    background: var(--tg-bg);
    box-shadow: 0 0 0 3px var(--gold-glow);
}

/* ===== Buttons ===== */
.btn-primary {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    padding: 15px 20px;
    background: linear-gradient(135deg, var(--gold) 0%, var(--gold-soft) 100%);
    border: none;
    border-radius: var(--radius-sm);
    color: var(--accent-text);
    font-size: 16px;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    transition: transform var(--transition), opacity var(--transition);
    box-shadow: 0 4px 16px rgba(212, 175, 55, 0.2);
    margin-top: 4px;
}

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

.btn-primary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.btn-primary svg {
    width: 18px;
    height: 18px;
}

/* ===== Answer / Response Box ===== */
.answer-box,
.response-box {
    margin-top: 20px;
    padding: 16px 18px;
    background: var(--tg-section-bg);
    border: 1px solid var(--tg-section-separator);
    border-left: 3px solid var(--gold);
    border-radius: var(--radius-sm);
    font-size: 15px;
    line-height: 1.6;
    color: var(--tg-text);
    white-space: pre-wrap;
    animation: pageEnter 240ms cubic-bezier(0.16, 1, 0.3, 1);
}

.answer-box.hidden,
.response-box.hidden {
    display: none;
}

.response-box.success {
    border-left-color: #34D399;
}

.response-box.error {
    border-left-color: #F87171;
}

/* ===== Loading ===== */
.loading {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-top: 16px;
    padding: 14px 18px;
    background: var(--tg-section-bg);
    border-radius: var(--radius-sm);
    color: var(--tg-hint);
    font-size: 14px;
}

.loading.hidden {
    display: none;
}

.spinner {
    width: 18px;
    height: 18px;
    border: 2px solid var(--gold-glow);
    border-top-color: var(--gold);
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
}

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

/* ===== Social Page ===== */
.social-section {
    margin-bottom: 26px;
}

.section-label {
    font-size: 12px;
    color: var(--tg-hint);
    text-transform: uppercase;
    letter-spacing: 0.6px;
    margin-bottom: 10px;
    padding-left: 4px;
    font-weight: 600;
}

.social-link {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 14px 16px;
    background: var(--tg-section-bg);
    border: 1px solid var(--tg-section-separator);
    border-radius: var(--radius-sm);
    color: var(--tg-text);
    text-decoration: none;
    font-size: 15px;
    font-weight: 500;
    margin-bottom: 8px;
    transition: transform var(--transition), border-color var(--transition);
}

.social-link:active {
    transform: scale(0.98);
    border-color: var(--gold);
}

.social-icon-wrap {
    flex-shrink: 0;
    width: 36px;
    height: 36px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

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

.social-icon-wrap.youtube { background: #FF0000; }
.social-icon-wrap.facebook { background: #1877F2; }
.social-icon-wrap.instagram { background: linear-gradient(45deg, #FEDA75, #FA7E1E, #D62976, #962FBF, #4F5BD5); }
.social-icon-wrap.apple { background: #000; }
.social-icon-wrap.android { background: #3DDC84; }

.social-meta {
    flex: 1;
    min-width: 0;
}

.social-name {
    display: block;
    font-weight: 600;
    color: var(--tg-text);
}

.social-handle {
    display: block;
    font-size: 12px;
    color: var(--tg-hint);
    margin-top: 1px;
}

.social-arrow {
    flex-shrink: 0;
    color: var(--tg-hint);
    opacity: 0.5;
}

.social-arrow svg {
    width: 14px;
    height: 14px;
}

/* ===== Language Page ===== */
.language-grid {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.lang-btn {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 16px 18px;
    background: var(--tg-section-bg);
    border: 1px solid var(--tg-section-separator);
    border-radius: var(--radius);
    color: var(--tg-text);
    font-size: 16px;
    font-weight: 500;
    font-family: inherit;
    cursor: pointer;
    transition: all var(--transition);
    text-align: left;
}

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

.lang-btn.active {
    background: var(--gold-glow);
    border-color: var(--gold);
    color: var(--gold);
}

.lang-flag {
    font-size: 22px;
    line-height: 1;
}

.lang-name {
    flex: 1;
    font-weight: 600;
}

.lang-native {
    font-size: 13px;
    color: var(--tg-hint);
    font-weight: 400;
}

.lang-btn.active .lang-native {
    color: var(--gold);
    opacity: 0.8;
}

.lang-check {
    color: var(--gold);
    opacity: 0;
    transition: opacity var(--transition);
}

.lang-btn.active .lang-check {
    opacity: 1;
}

.lang-check svg {
    width: 18px;
    height: 18px;
}

/* ===== Char counter ===== */
.char-counter {
    text-align: right;
    font-size: 12px;
    color: var(--tg-hint);
    margin-top: -4px;
    padding-right: 4px;
}

.char-counter.warn {
    color: #F87171;
}

/* Auto light-mode adjustments using prefers-color-scheme as fallback */
@media (prefers-color-scheme: light) {
    :root {
        --tg-bg: var(--tg-theme-bg-color, #FFFFFF);
        --tg-text: var(--tg-theme-text-color, #1A1D27);
        --tg-hint: var(--tg-theme-hint-color, #6B7280);
        --tg-secondary-bg: var(--tg-theme-secondary-bg-color, #F4F4F5);
        --tg-section-bg: var(--tg-theme-section-bg-color, #F9F9FB);
        --tg-section-separator: var(--tg-theme-section-separator-color, rgba(0,0,0,0.08));
    }

    .logo-circle {
        box-shadow: 0 4px 16px rgba(212, 175, 55, 0.3);
    }

    textarea:focus,
    input:focus {
        background: white;
    }
}