/**
 * Base CSS - общие стили для всего веб-приложения
 * Включает: reset, шрифты, базовые компоненты
 * 
 * Dependencies: tokens.css (должен быть подключен первым)
 */

/* ===== Fonts ===== */
@font-face {
    font-family: 'HelveticaMedium';
    src: url('/static/fonts/HelveticaMedium.ttf') format('truetype');
    font-weight: normal;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: 'SFPro';
    src: url('/static/fonts/SFProDisplay-Medium.ttf') format('truetype');
    font-weight: normal;
    font-style: normal;
    font-display: swap;
}

/* ===== Reset & Base ===== */
*,
*::before,
*::after {
    box-sizing: border-box;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

html {
    height: 100%;
    scroll-behavior: smooth;
}

body {
    margin: 0;
    padding: 0;
    min-height: 100%;
    font-family: var(--font-body);
    background-color: var(--bg-page);
    color: var(--text-primary);
    line-height: var(--leading-normal);
}

a {
    color: inherit;
    text-decoration: none;
}

button {
    font-family: inherit;
    cursor: pointer;
}

button:focus-visible {
    outline: 2px solid var(--focus-ring);
    outline-offset: 2px;
}

img {
    max-width: 100%;
    height: auto;
}

/* ===== Typography ===== */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: 600;
    margin: 0;
    color: var(--text-primary);
}

h1 {
    font-size: var(--text-2xl);
    letter-spacing: -0.02em;
}

h2 {
    font-size: var(--text-xl);
    letter-spacing: -0.01em;
}

h3 {
    font-size: var(--text-lg);
}

p {
    margin: 0;
    color: var(--text-secondary);
}

/* ===== Lucide Icons ===== */
[data-lucide] {
    width: 1em;
    height: 1em;
    stroke-width: 2;
}

/* ===== Loading Overlay ===== */
.loading-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(244, 246, 249, 0.85);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    z-index: var(--z-loading);
}

.loading-overlay.active {
    display: flex;
    align-items: center;
    justify-content: center;
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border-subtle);
    border-top-color: var(--plan-chat);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* Dark theme loading */
@media (prefers-color-scheme: dark) {
    .loading-overlay {
        background: rgba(15, 15, 18, 0.85);
    }
}

/* ===== Legacy Button Styles (для совместимости) ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-5);
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--btn-radius);
    font-family: var(--font-display);
    font-size: var(--btn-font-size);
    font-weight: 600;
    color: var(--text-secondary);
    cursor: pointer;
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    box-shadow: var(--glass-shadow);
    transition: 
        transform var(--duration-fast) var(--ease-out),
        box-shadow var(--duration-fast) var(--ease-out),
        background-color var(--duration-fast) ease,
        color var(--duration-fast) ease;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--glass-shadow-hover);
    color: var(--text-primary);
}

.btn:active {
    transform: translateY(1px) scale(0.98);
}

.btn--primary {
    background: var(--plan-chat);
    border-color: var(--plan-chat);
    color: var(--text-inverse);
}

.btn--primary:hover {
    box-shadow: 0 4px 16px var(--plan-chat-glow);
    color: var(--text-inverse);
}

.btn--full {
    width: 100%;
}

.btn-icon {
    width: 18px;
    height: 18px;
    stroke-width: 2;
}

/* ===== Legacy Input Field (для совместимости) ===== */
.input-field {
    width: 100%;
    height: 48px;
    padding: 0 var(--space-4);
    background: var(--hover-overlay);
    border: 1px solid var(--border-subtle);
    border-radius: 12px;
    font-family: var(--font-body);
    font-size: var(--text-base);
    color: var(--text-primary);
    transition: 
        border-color var(--duration-fast) ease,
        background-color var(--duration-fast) ease,
        box-shadow var(--duration-fast) ease;
}

.input-field:focus {
    outline: none;
    border-color: var(--plan-chat);
    background: transparent;
    box-shadow: 0 0 0 3px var(--plan-chat-glow);
}

.input-field::placeholder {
    color: var(--text-muted);
}

/* ===== Legacy Content Container ===== */
.content {
    width: 90%;
    max-width: 480px;
    margin: 0 auto;
}

/* ===== Utility Classes ===== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.hidden { display: none !important; }
.flex { display: flex; }
.flex-center {
    display: flex;
    align-items: center;
    justify-content: center;
}

/* ===== Manage Buttons Container (legacy) ===== */
.manage-buttons {
    display: flex;
    gap: var(--space-3);
    margin-top: var(--space-4);
}

/* ===== Modal (legacy) ===== */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: var(--z-modal);
    padding: var(--space-4);
}

.modal-overlay.active {
    display: flex;
}

.modal-content {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--card-radius);
    padding: var(--space-6);
    max-width: 360px;
    width: 100%;
    text-align: center;
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    box-shadow: var(--glass-shadow-hover);
}

/* ===== Telegram WebApp: скрываем HTML-навигацию, используются нативные кнопки ===== */
body.tg-webapp #manageButtons {
    display: none !important;
}