/* Base styles - iOS 18 + Liquid Glass design */
:root {
    /* Colors */
    --color-primary: #007aff;
    --color-primary-dark: #0056cc;
    --color-secondary: #5856d6;
    --color-success: #30d158;
    --color-warning: #ff9f0a;
    --color-error: #ff3b30;
    --color-link: #007aff;

    /* Backgrounds */
    --bg-primary: #f2f2f7;
    --bg-secondary: #ffffff;
    --bg-tertiary: #f8f8f8;
    --bg-glass: rgba(255, 255, 255, 0.8);
    --bg-glass-dark: rgba(0, 0, 0, 0.05);

    /* Text colors */
    --text-primary: #000000;
    --text-secondary: #6d6d80;
    --text-tertiary: #8e8e93;
    --text-white: #ffffff;

    /* Shadows */
    --shadow-light: 0 1px 3px rgba(0, 0, 0, 0.12);
    --shadow-medium: 0 4px 12px rgba(0, 0, 0, 0.15);
    --shadow-heavy: 0 8px 25px rgba(0, 0, 0, 0.2);

    /* Borders */
    --border-radius: 12px;
    --border-radius-small: 8px;
    --border-radius-large: 20px;
    --border-color: rgba(0, 0, 0, 0.1);

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

/* Dark theme for Telegram WebApp */
@media (prefers-color-scheme: dark) {
    :root {
        /* Colors - темная тема */
        --color-primary: #0a84ff;
        --color-primary-dark: #0066cc;
        --color-secondary: #5e5ce6;
        --color-success: #32d74b;
        --color-warning: #ff9f0a;
        --color-error: #ff453a;
        --color-link: #0a84ff;

        /* Backgrounds - темная тема */
        --bg-primary: #000000;
        --bg-secondary: #1c1c1e;
        --bg-tertiary: #2c2c2e;
        --bg-glass: rgba(28, 28, 30, 0.8);
        --bg-glass-dark: rgba(255, 255, 255, 0.05);

        /* Text colors - темная тема */
        --text-primary: #ffffff;
        --text-secondary: #98989d;
        --text-tertiary: #636366;
        --text-white: #ffffff;

        /* Shadows - темная тема */
        --shadow-light: 0 1px 3px rgba(0, 0, 0, 0.3);
        --shadow-medium: 0 4px 12px rgba(0, 0, 0, 0.4);
        --shadow-heavy: 0 8px 25px rgba(0, 0, 0, 0.5);

        /* Borders - темная тема */
        --border-color: rgba(255, 255, 255, 0.1);
    }
}

/* Telegram WebApp specific dark theme */
body.tg-dark-theme {
    /* Colors - темная тема Telegram */
    --color-primary: #0a84ff;
    --color-primary-dark: #0066cc;
    --color-secondary: #5e5ce6;
    --color-success: #32d74b;
    --color-warning: #ff9f0a;
    --color-error: #ff453a;
    --color-link: #0a84ff;

    /* Backgrounds - темная тема Telegram */
    --bg-primary: #17212b;
    --bg-secondary: #1d2733;
    --bg-tertiary: #2c3847;
    --bg-glass: rgba(29, 39, 51, 0.8);
    --bg-glass-dark: rgba(255, 255, 255, 0.05);

    /* Text colors - темная тема Telegram */
    --text-primary: #ffffff;
    --text-secondary: #98989d;
    --text-tertiary: #636366;
    --text-white: #ffffff;

    /* Shadows - темная тема Telegram */
    --shadow-light: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-medium: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-heavy: 0 8px 25px rgba(0, 0, 0, 0.5);

    /* Borders - темная тема Telegram */
    --border-color: rgba(255, 255, 255, 0.1);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    font-size: 16px;
    overflow-x: hidden;
}

#page-logo-text {
    color: var(--color-primary);
}

body.tg-dark-theme #page-logo-text {
    color: var(--text-primary);
}

/* Liquid Glass Effect */
.glass {
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-light);
}

.glass-dark {
    background: var(--bg-glass-dark);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
}

/* Container - Mobile First */
.container {
    max-width: 100%;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Typography */
.title {
    font-size: 32px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

.subtitle {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.text-secondary {
    color: var(--text-secondary);
}

.text-small {
    font-size: 14px;
    color: var(--text-tertiary);
}

/* Cards */
.card {
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    box-shadow: var(--shadow-light);
    border: 1px solid var(--border-color);
    transition: all 0.2s ease;
}

.card:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-medium);
}

.card-glass {
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}

/* Page Header */
.page-header {
    margin-bottom: var(--spacing-xl);
    text-align: center;
}

.page-title {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    font-size: 28px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.page-subtitle {
    color: var(--text-secondary);
    font-size: 16px;
}

/* Buttons - Mobile Optimized */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 16px 24px;
    border-radius: var(--border-radius);
    border: none;
    font-size: 16px;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.2s ease;
    gap: var(--spacing-sm);
    min-height: 48px;
    touch-action: manipulation;
}

.btn-primary {
    background: var(--color-primary);
    color: var(--text-white);
}

.btn-primary:hover {
    background: var(--color-primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-medium);
}

.btn-secondary {
    background: var(--bg-glass);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}

.btn-secondary:hover {
    background: var(--bg-secondary);
    transform: translateY(-1px);
}

.btn-success {
    background: var(--color-success);
    color: var(--text-white);
}

.btn-warning {
    background: var(--color-warning);
    color: var(--text-white);
}

.btn-error {
    background: var(--color-error);
    color: var(--text-white);
}

.btn-small {
    padding: 8px 16px;
    font-size: 14px;
}

.btn-large {
    padding: 16px 32px;
    font-size: 18px;
}

/* Forms - Mobile Optimized */
.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
    color: var(--text-primary);
    font-size: 16px;
}

.form-input {
    width: 100%;
    padding: 16px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 16px;
    background: var(--bg-secondary);
    transition: all 0.2s ease;
    min-height: 48px;
    touch-action: manipulation;
    color: var(--tg-theme-text-color);
}

.form-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.1);
}

.form-textarea {
    resize: vertical;
    min-height: 100px;
}

/* Navigation - Hidden on mobile */
.nav {
    display: none;
}

/* Utilities */
.d-flex {
    display: flex;
}

.justify-center {
    justify-content: center;
}

.justify-between {
    justify-content: space-between;
}

.align-center {
    align-items: center;
}

.gap-sm {
    gap: var(--spacing-sm);
}

.gap-md {
    gap: var(--spacing-md);
}

.mt-sm {
    margin-top: var(--spacing-sm);
}

.mt-md {
    margin-top: var(--spacing-md);
}

.mb-sm {
    margin-bottom: var(--spacing-sm);
}

.mb-md {
    margin-bottom: var(--spacing-md);
}

.text-center {
    text-align: center;
}

.hidden {
    display: none !important;
}

/* Mobile-first styles are already applied above */

/* Payment success modal */
#payment-success-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 10001;
    animation: fadeIn 0.3s ease;
}

#payment-success-modal .modal-content {
    background: var(--bg-primary);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    max-width: 500px;
    width: 90%;
    text-align: center;
    box-shadow: var(--shadow-heavy);
    animation: slideIn 0.3s ease;
    border: 1px solid var(--border-color);
}

#payment-success-modal .success-header {
    margin-bottom: var(--spacing-lg);
}

#payment-success-modal .success-header h2 {
    color: var(--text-primary);
    margin: 15px 0 0 0;
    font-size: 24px;
    font-weight: 700;
}

#payment-success-modal .success-body {
    margin-bottom: var(--spacing-xl);
}

#payment-success-modal .success-body p {
    color: var(--text-secondary);
    line-height: 1.6;
    margin: 10px 0;
    font-size: 16px;
}

#payment-success-modal .success-actions {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    flex-wrap: wrap;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}