/* ========================================
   ProSong Payment Page Styles
   Dark Premium Theme — ПроПесни
   ======================================== */

/* ── CSS Variables ───────────────────────── */
:root {
    /* Gold / Brand */
    --color-gold:        #C9A227;
    --color-gold-hover:  #E0B830;
    --color-gold-dark:   #8B6914;
    --color-gold-light:  rgba(201, 162, 39, 0.15);
    --color-gold-border: rgba(201, 162, 39, 0.35);

    /* Background layers */
    --color-bg:          #0C0F1E;
    --color-surface:     #141929;
    --color-surface-2:   #1C2235;
    --color-border:      rgba(255, 255, 255, 0.07);

    /* Text */
    --color-text:        #FFFFFF;
    --color-text-muted:  rgba(255, 255, 255, 0.55);
    --color-text-dim:    rgba(255, 255, 255, 0.30);

    /* Aliases used in HTML */
    --color-primary:       var(--color-gold);
    --color-primary-hover: var(--color-gold-hover);
    --color-primary-light: var(--color-gold-light);
    --color-primary-dark:  var(--color-gold-dark);
    --color-white:     #ffffff;
    --color-gray-50:   #141929;
    --color-gray-100:  #1C2235;
    --color-gray-200:  rgba(255, 255, 255, 0.08);
    --color-gray-300:  rgba(255, 255, 255, 0.15);
    --color-gray-400:  rgba(255, 255, 255, 0.30);
    --color-gray-500:  rgba(255, 255, 255, 0.45);
    --color-gray-600:  rgba(255, 255, 255, 0.55);
    --color-gray-700:  rgba(255, 255, 255, 0.70);
    --color-gray-800:  rgba(255, 255, 255, 0.85);
    --color-gray-900:  #FFFFFF;

    /* Semantic */
    --color-success:       #22C55E;
    --color-success-light: rgba(34, 197, 94, 0.15);
    --color-error:         #EF4444;
    --color-error-light:   rgba(239, 68, 68, 0.15);
    --color-warning:       #F59E0B;

    /* Shadows */
    --shadow-sm:   0 1px 3px rgba(0, 0, 0, 0.4);
    --shadow-md:   0 4px 12px rgba(0, 0, 0, 0.5);
    --shadow-lg:   0 8px 24px rgba(0, 0, 0, 0.6);
    --shadow-xl:   0 16px 40px rgba(0, 0, 0, 0.7);
    --shadow-gold: 0 4px 20px rgba(201, 162, 39, 0.30);

    /* Border Radius */
    --radius-sm:   6px;
    --radius-md:   10px;
    --radius-lg:   14px;
    --radius-xl:   18px;
    --radius-full: 9999px;

    /* Spacing */
    --spacing-xs:  4px;
    --spacing-sm:  8px;
    --spacing-md:  16px;
    --spacing-lg:  24px;
    --spacing-xl:  32px;
    --spacing-2xl: 48px;

    /* Typography */
    --font-family:         'Montserrat', sans-serif;
    --font-family-heading: 'Montserrat', sans-serif;
    --font-size-xs:   12px;
    --font-size-sm:   13px;
    --font-size-base: 15px;
    --font-size-lg:   17px;
    --font-size-xl:   20px;
    --font-size-2xl:  24px;
    --font-size-3xl:  30px;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 200ms ease;
    --transition-slow: 300ms ease;
}

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

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-family);
    font-weight: 500;
    font-size: var(--font-size-base);
    line-height: 1.5;
    color: var(--color-text);
    background: var(--color-bg);
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-family-heading);
    font-weight: 600;
}

/* ── Container ───────────────────────────── */
.container {
    width: 100%;
    max-width: 480px;
    margin: 0 auto;
    padding: var(--spacing-md);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ── Header ──────────────────────────────── */
.header {
    padding: var(--spacing-md) 0;
    margin-bottom: var(--spacing-lg);
    border-bottom: 1px solid var(--color-border);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--color-gold);
}

.logo-star {
    height: 40px;
    width: auto;
    flex-shrink: 0;
    filter: drop-shadow(0 0 8px rgba(201, 162, 39, 0.55));
}

.logo-label {
    height: 22px;
    width: auto;
    flex-shrink: 0;
}

/* ── State Containers ────────────────────── */
.state-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: var(--spacing-xl);
}

.hidden {
    display: none !important;
}

/* ── Loading ─────────────────────────────── */
.spinner {
    width: 48px;
    height: 48px;
    border: 3px solid var(--color-border);
    border-top-color: var(--color-gold);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin-bottom: var(--spacing-md);
    box-shadow: 0 0 16px rgba(201, 162, 39, 0.2);
}

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

/* ── Error State ─────────────────────────── */
.error-icon {
    width: 64px;
    height: 64px;
    color: var(--color-error);
    margin-bottom: var(--spacing-md);
    filter: drop-shadow(0 0 10px rgba(239, 68, 68, 0.4));
}

.error-icon svg {
    width: 100%;
    height: 100%;
}

#error-state h2 {
    color: var(--color-error);
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-sm);
}

#error-state p {
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-lg);
}

/* ── Success State ───────────────────────── */
.success-icon {
    width: 80px;
    height: 80px;
    color: var(--color-success);
    margin-bottom: var(--spacing-md);
    filter: drop-shadow(0 0 14px rgba(34, 197, 94, 0.5));
}

.success-icon svg {
    width: 100%;
    height: 100%;
}

#success-state h2 {
    color: var(--color-success);
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-sm);
}

#success-state p {
    color: var(--color-text-muted);
}

/* ── Main Content ────────────────────────── */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

/* ── Cards ───────────────────────────────── */
.card {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--color-border);
}

.card-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--color-border);
}

/* ── Client Info ─────────────────────────── */
.client-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.info-row {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.info-label {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.07em;
}

.info-value {
    font-size: var(--font-size-base);
    color: var(--color-text);
    font-weight: 500;
    word-break: break-word;
}

/* ── Services ────────────────────────────── */
.services-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.service-item {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: var(--spacing-md);
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--color-border);
}

.service-item:last-child {
    border-bottom: none;
}

.service-name {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    flex: 1;
}

.service-price {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-gold);
    white-space: nowrap;
}

/* ── Total Row ───────────────────────────── */
.total-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-gold-border);
}

.total-label {
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--color-text);
}

.total-value {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-gold);
    text-shadow: 0 0 20px rgba(201, 162, 39, 0.4);
}

/* ── Payment Section ─────────────────────── */
.payment-section {
    margin-top: auto;
    padding-top: var(--spacing-md);
}

.payment-note {
    text-align: center;
    font-size: var(--font-size-xs);
    color: var(--color-text-dim);
    margin-top: var(--spacing-md);
}

/* ── Buttons ─────────────────────────────── */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    font-family: var(--font-family);
    font-size: var(--font-size-sm);
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-primary {
    background: linear-gradient(135deg, #C9A227 0%, #8B6914 100%);
    color: #0C0F1E;
    box-shadow: var(--shadow-gold);
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-1px);
    background: linear-gradient(135deg, #E0B830 0%, #C9A227 100%);
    box-shadow: 0 6px 24px rgba(201, 162, 39, 0.50);
}

.btn-primary:active:not(:disabled) {
    transform: translateY(0);
}

.btn-secondary {
    background: transparent;
    color: var(--color-gold);
    border: 2px solid var(--color-gold-border);
}

.btn-secondary:hover:not(:disabled) {
    background: var(--color-gold-light);
    border-color: var(--color-gold);
}

.btn-pay {
    width: 100%;
    padding: var(--spacing-lg);
    font-size: var(--font-size-base);
    border-radius: var(--radius-lg);
}

.btn-spinner {
    width: 20px;
    height: 20px;
    border: 2px solid rgba(12, 15, 30, 0.35);
    border-top-color: #0C0F1E;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

/* ── Links ───────────────────────────────── */
.link {
    color: var(--color-gold);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.link:hover {
    color: var(--color-gold-hover);
    text-decoration: underline;
}

/* ── Footer ──────────────────────────────── */
.footer {
    padding: var(--spacing-lg) 0 var(--spacing-md);
    text-align: center;
    border-top: 1px solid var(--color-border);
    margin-top: var(--spacing-lg);
}

.footer p {
    font-size: var(--font-size-xs);
    color: var(--color-text-dim);
}

/* ── Tablet (640px+) ─────────────────────── */
@media (min-width: 640px) {
    .container {
        padding: var(--spacing-xl);
    }

    .header {
        padding: var(--spacing-lg) 0;
    }

    .logo-star {
        height: 48px;
    }

    .logo-label {
        height: 26px;
    }

    .card {
        padding: var(--spacing-xl);
    }

    .card-title {
        font-size: var(--font-size-xl);
    }

    .info-row {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
    }

    .info-value {
        text-align: right;
    }

    .service-name {
        font-size: var(--font-size-base);
    }

    .service-price {
        font-size: var(--font-size-base);
    }

    .total-value {
        font-size: var(--font-size-2xl);
    }
}

/* ── Desktop (1024px+) ───────────────────── */
@media (min-width: 1024px) {
    body {
        display: flex;
        align-items: center;
        justify-content: center;
        background:
            radial-gradient(ellipse 60% 50% at 20% 40%, rgba(201, 162, 39, 0.05) 0%, transparent 60%),
            radial-gradient(ellipse 50% 60% at 80% 60%, rgba(201, 162, 39, 0.04) 0%, transparent 60%),
            var(--color-bg);
    }

    .container {
        min-height: auto;
        padding: var(--spacing-2xl);
        background: var(--color-surface);
        border-radius: var(--radius-xl);
        box-shadow: var(--shadow-xl), 0 0 80px rgba(201, 162, 39, 0.06);
        border: 1px solid var(--color-border);
        margin: var(--spacing-xl);
    }

    .card {
        background: var(--color-surface-2);
    }
}

/* ── Animations ──────────────────────────── */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(12px); }
    to   { opacity: 1; transform: translateY(0); }
}

.main-content       { animation: fadeIn 0.3s ease-out; }
.card               { animation: fadeIn 0.4s ease-out; }
.card:nth-child(2)  { animation-delay: 0.1s; }

/* ── Print ───────────────────────────────── */
@media print {
    body { background: white; color: black; }
    .container { box-shadow: none; }
    .btn-pay, .payment-note, .footer { display: none; }
}