/* Основные стили приложения */
@import './variables.css';

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

html {
    font-size: calc(16px * var(--font-scale, 1));
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg);
    color: var(--text-primary);
    line-height: 1.5;
    overflow-x: hidden;
    min-height: 100vh;
}

:root[data-animations="off"] * {
    transition: none !important;
    animation: none !important;
}

/* Запрет выделения текста на кнопках и кликабельных элементах */
button,
.btn,
[role="button"],
.chat-item,
.message-menu button {
    user-select: none;
    -webkit-user-select: none;
    -ms-user-select: none;
    -webkit-tap-highlight-color: transparent;
}

/* ============= App Container ============= */
#app {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ============= Main Layout ============= */
.main-layout {
    display: grid;
    grid-template-columns: var(--sidebar-width) 1fr;
    height: 100vh;
}

.main-sidebar {
    background: var(--sidebar-bg);
    border-right: 1px solid var(--border);
    overflow: hidden;
}

.main-content {
    background: var(--background);
    overflow: hidden;
}

.empty-state {
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    gap: var(--spacing-sm);
}

/* ============= Modal ============= */
#profileModalContainer {
    position: fixed;
    inset: 0;
    display: none;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.45);
    backdrop-filter: blur(8px);
    z-index: 10000;
}

.modal-content {
    width: min(90vw, 520px);
    height: 80vh;
    max-height: 760px;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: var(--spacing-lg);
    position: relative;
    box-shadow: var(--shadow-lg);
}

.settings-shell {
    padding: 0;
    overflow: hidden;
}

.modal-close {
    position: absolute;
    top: 10px;
    right: 10px;
}

@media (max-width: 900px) {
    .main-layout {
        grid-template-columns: 1fr;
    }
    .main-sidebar {
        display: none;
    }
}

/* ============= Loading Screen ============= */
.loading-screen {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: var(--gradient-bg);
    color: var(--foreground);
}

.loading-spinner {
    width: 48px;
    height: 48px;
    border: 3px solid var(--border);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin-bottom: var(--spacing-md);
}

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

.loading-screen p {
    color: var(--muted-foreground);
    font-size: 0.875rem;
}

/* ============= Typography ============= */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
}

h1 { font-size: 2rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.25rem; }
h4 { font-size: 1.125rem; }
h5 { font-size: 1rem; }
h6 { font-size: 0.875rem; }

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

a {
    color: var(--primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--primary-hover);
}

/* ============= Buttons ============= */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.625rem 1.25rem;
    font-size: 0.875rem;
    font-weight: 500;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    transition: all var(--transition-fast);
    background: transparent;
    color: var(--text-primary);
    font-family: inherit;
}

.btn img {
    width: 18px;
    height: 18px;
    display: block;
    filter: var(--icon-image-filter);
}

.btn-icon {
    padding: 0.5rem;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

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

.btn-primary {
    background: var(--gradient-primary);
    color: var(--primary-foreground);
    box-shadow: var(--glow-soft);
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-1px);
    box-shadow: var(--glow-primary);
}

.btn-secondary {
    background: var(--secondary);
    color: var(--secondary-foreground);
}

.btn-secondary:hover:not(:disabled) {
    background: var(--muted);
}

.btn-ghost {
    background: transparent;
    color: var(--foreground);
}

.btn-ghost:hover:not(:disabled) {
    background: var(--muted);
}

.btn-destructive {
    background: var(--destructive);
    color: var(--destructive-foreground);
}

.btn-destructive:hover:not(:disabled) {
    background: hsl(0, 84%, 55%);
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.8125rem;
}

.btn-lg {
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
}

/* ============= Forms ============= */
.form-group {
    margin-bottom: var(--spacing-md);
}

.form-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: var(--spacing-xs);
    color: var(--foreground);
}

.form-input {
    width: 100%;
    padding: 0.75rem 1rem;
    font-size: 0.875rem;
    font-family: inherit;
    background: var(--input);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--foreground);
    transition: all var(--transition-fast);
}

.form-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-light);
}

.form-input::placeholder {
    color: var(--muted-foreground);
}

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

.form-error {
    display: block;
    font-size: 0.75rem;
    color: var(--destructive);
    margin-top: var(--spacing-xs);
}

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

/* ============= Utilities ============= */
.hidden {
    display: none !important;
}

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

.text-muted {
    color: var(--muted-foreground);
}

.text-small {
    font-size: 0.875rem;
}

.text-xs {
    font-size: 0.75rem;
}

.mt-1 { margin-top: var(--spacing-xs); }
.mt-2 { margin-top: var(--spacing-sm); }
.mt-3 { margin-top: var(--spacing-md); }
.mt-4 { margin-top: var(--spacing-lg); }

.mb-1 { margin-bottom: var(--spacing-xs); }
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-3 { margin-bottom: var(--spacing-md); }
.mb-4 { margin-bottom: var(--spacing-lg); }

.p-1 { padding: var(--spacing-xs); }
.p-2 { padding: var(--spacing-sm); }
.p-3 { padding: var(--spacing-md); }
.p-4 { padding: var(--spacing-lg); }

/* ============= Scrollbar ============= */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--background);
}

::-webkit-scrollbar-thumb {
    background: var(--muted);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--border);
}

/* ============= Responsive ============= */
@media (max-width: 768px) {
    html {
        font-size: 14px;
    }
    
    .btn {
        padding: 0.75rem 1rem;
    }
}

/* ============= Animations ============= */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeIn var(--transition-smooth) ease-out;
}

@keyframes slideIn {
    from {
        transform: translateX(-100%);
    }
    to {
        transform: translateX(0);
    }
}

.slide-in {
    animation: slideIn var(--transition-smooth) ease-out;
}