/**
 * MBTI人格乐园 Mobile Styles
 * Mobile-first responsive design system
 */

/* ========================================
   MOBILE-SPECIFIC OVERRIDES
   ======================================== */

/* Base mobile styles */
@media (max-width: 640px) {
    html {
        font-size: 14px;
    }

    h1 { font-size: 1.75rem; }
    h2 { font-size: 1.5rem; }
    h3 { font-size: 1.25rem; }
    h4 { font-size: 1.125rem; }
    h5 { font-size: 1rem; }
    h6 { font-size: 0.875rem; }

    .container {
        padding-left: var(--space-3);
        padding-right: var(--space-3);
    }

    .mobile-grid-1 { grid-template-columns: repeat(1, 1fr); }
    .mobile-grid-2 { grid-template-columns: repeat(1, 1fr); }

    .flex-mobile-col { flex-direction: column; }
    .flex-mobile-row { flex-direction: row; }
}

/* ========================================
   MOBILE NAVIGATION
   ======================================== */

.mobile-nav {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-top: 1px solid var(--border-default);
    padding: var(--space-2) var(--space-4);
    z-index: var(--z-sticky);
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1);
}

@media (max-width: 768px) {
    .mobile-nav { display: flex; justify-content: space-around; align-items: center; }
}

.mobile-nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    padding: var(--space-2);
    color: var(--text-tertiary);
    text-decoration: none;
    font-size: 10px;
    transition: color var(--duration-150) var(--ease-in-out);
}

.mobile-nav-item.active { color: var(--color-primary); }
.mobile-nav-item:hover { color: var(--color-primary-600); }

.mobile-nav-item svg, .mobile-nav-item .nav-icon { width: 24px; height: 24px; }

/* Mobile header */
.mobile-header {
    display: none;
    position: sticky;
    top: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-default);
    padding: var(--space-3) var(--space-4);
    z-index: var(--z-sticky);
}

@media (max-width: 768px) {
    .mobile-header { display: flex; align-items: center; justify-content: space-between; }
}

.mobile-header-title {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
}

.mobile-menu-btn {
    display: none;
    width: 40px;
    height: 40px;
    background: transparent;
    border: none;
    border-radius: var(--radius-md);
    color: var(--text-primary);
    cursor: pointer;
    align-items: center;
    justify-content: center;
}

@media (max-width: 768px) {
    .mobile-menu-btn { display: flex; }
}

/* ========================================
   MOBILE COMPONENT OPTIMIZATIONS
   ======================================== */

@media (max-width: 640px) {
    .feature-card { padding: var(--space-4); }
    .feature-icon { font-size: 48px; margin-bottom: var(--space-3); }
    .feature-title { font-size: var(--font-size-xl); }

    .card { padding: var(--space-4); }
    .card-header { padding-bottom: var(--space-3); margin-bottom: var(--space-3); }

    .form-input, .form-select, .form-textarea {
        font-size: 16px;
        padding: var(--space-3) var(--space-4);
    }

    .input-group { margin-bottom: var(--space-5); }

    .btn { min-height: 44px; }
    .btn-sm { min-height: 36px; }
    .btn-lg { min-height: 52px; }

    .chat-message { gap: var(--space-2); }
    .chat-avatar { width: 32px; height: 32px; }
    .chat-bubble { max-width: 85%; padding: var(--space-3); }
    .chat-input-area { padding: var(--space-3); }

    .modal {
        width: 100%; height: 100%;
        max-width: 100%; max-height: 100%;
        border-radius: 0;
        top: 0; left: 0;
        transform: none;
    }

    .modal.active { transform: none; }

    .modal-header, .modal-body, .modal-footer { padding: var(--space-4); }

    .status-panel { padding: var(--space-4); margin: var(--space-6) 0; }
    .status-title { font-size: var(--font-size-2xl); margin-bottom: var(--space-4); }
    .status-item { padding: var(--space-4); }
    .status-value { font-size: var(--font-size-xl); }

    .hero-section { padding: var(--space-6) var(--space-3); }
    .hero-title { font-size: var(--font-size-3xl); margin-bottom: var(--space-4); }
    .user-bar { width: 100%; justify-content: space-between; padding: var(--space-2) var(--space-3); }

    .quick-test { padding: var(--space-6); margin: var(--space-6) 0; }
    .quick-test h2 { font-size: var(--font-size-2xl); }
    .quick-test p { font-size: var(--font-size-base); }

    .footer { padding: var(--space-8) var(--space-3); margin-top: var(--space-8); font-size: var(--font-size-sm); }
}

/* ========================================
   MOBILE GRID HELPERS
   ======================================== */

.grid-mobile-1 { grid-template-columns: 1fr; }
.grid-mobile-2 { grid-template-columns: repeat(2, 1fr); }

@media (min-width: 640px) {
    .grid-sm-1 { grid-template-columns: 1fr; }
    .grid-sm-2 { grid-template-columns: repeat(2, 1fr); }
    .grid-sm-3 { grid-template-columns: repeat(3, 1fr); }
}

@media (min-width: 768px) {
    .grid-md-1 { grid-template-columns: 1fr; }
    .grid-md-2 { grid-template-columns: repeat(2, 1fr); }
    .grid-md-3 { grid-template-columns: repeat(3, 1fr); }
    .grid-md-4 { grid-template-columns: repeat(4, 1fr); }
}

@media (min-width: 1024px) {
    .grid-lg-1 { grid-template-columns: 1fr; }
    .grid-lg-2 { grid-template-columns: repeat(2, 1fr); }
    .grid-lg-3 { grid-template-columns: repeat(3, 1fr); }
    .grid-lg-4 { grid-template-columns: repeat(4, 1fr); }
}

/* ========================================
   MOBILE SAFE AREA (iPhone X+)
   ======================================== */

@supports (padding: max(0px)) {
    .mobile-nav { padding-bottom: max(var(--space-2), env(safe-area-inset-bottom)); }
}

/* ========================================
   MOBILE DARK MODE
   ======================================== */

@media (max-width: 640px) {
    [data-theme="dark"] .mobile-nav {
        background: rgba(17, 24, 39, 0.95);
        border-top-color: var(--border-default);
    }

    [data-theme="dark"] .mobile-header {
        background: rgba(17, 24, 39, 0.95);
        border-bottom-color: var(--border-default);
    }
}

/* ========================================
   MOBILE TOUCH OPTIMIZATIONS
   ======================================== */

@media (hover: none) and (pointer: coarse) {
    .feature-card:hover, .card:hover { transform: none; }
    .feature-card:active, .card:active { transform: scale(0.98); }
    .btn:active { transform: scale(0.95); }
}

/* ========================================
   MOBILE LANDSCAPE
   ======================================== */

@media (max-width: 960px) and (orientation: landscape) {
    .mobile-nav {
        padding-top: var(--space-1); padding-bottom: var(--space-1);
    }
    .mobile-nav-item { padding: var(--space-1); }
    .mobile-nav-item svg, .mobile-nav-item .nav-icon { width: 20px; height: 20px; }
}

/* ========================================
   UTILITY CLASSES
   ======================================== */

@media (max-width: 640px) {
    .mobile-hidden { display: none; }
    .mobile-block { display: block; }
    .mobile-flex { display: flex; }
    .mobile-text-center { text-align: center; }
    .mobile-w-full { width: 100%; }
}