/* ===============================
   RACING ANALYTICS - MAIN STYLES
   Base styles, variables, and sidebar
   =============================== */

:root {
    --green-vibrant: #48BF5F;
    --green-dark: #228B22;
    --green-light: #e8f5e9;
    --green-glow: rgba(72, 191, 95, 0.15);
    --orange: #f59e0b;
    --orange-light: #fef3c7;
    --white: #ffffff;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-500: #6b7280;
    --gray-700: #374151;
    --gray-900: #111827;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 20px 40px -15px rgba(34, 139, 34, 0.15);
    
    /* Sidebar variables */
    --sidebar-width: 260px;
    --sidebar-collapsed-width: 70px;
    --sidebar-bg: #1a1f2e;
    --sidebar-hover: #252b3d;
    --sidebar-active: linear-gradient(135deg, var(--green-dark) 0%, var(--green-vibrant) 100%);
    --transition-speed: 0.3s;
}

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

body {
    font-family: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--gray-50);
    color: var(--gray-900);
    min-height: 100vh;
    line-height: 1.6;
}

/* ===============================
   APP LAYOUT
   =============================== */
.app-container {
    display: flex;
    min-height: 100vh;
}

/* ===============================
   SIDEBAR
   =============================== */
.sidebar {
    width: var(--sidebar-width);
    background: var(--sidebar-bg);
    min-height: 100vh;
    position: fixed;
    left: 0;
    top: 0;
    z-index: 100;
    display: flex;
    flex-direction: column;
    transition: width var(--transition-speed) ease;
    box-shadow: 4px 0 20px rgba(0, 0, 0, 0.15);
}

.sidebar.collapsed {
    width: var(--sidebar-collapsed-width);
}

/* Sidebar Header */
.sidebar-header {
    padding: 1.5rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    gap: 1rem;
    min-height: 80px;
}

.sidebar-logo {
    width: 44px;
    height: 44px;
    background: var(--white);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 4px;
    flex-shrink: 0;
}

.sidebar-logo img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.sidebar-brand {
    overflow: hidden;
    white-space: nowrap;
    transition: opacity var(--transition-speed) ease;
}

.sidebar.collapsed .sidebar-brand {
    opacity: 0;
    width: 0;
}

.sidebar-brand h1 {
    color: var(--white);
    font-size: 1.1rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.sidebar-brand p {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.75rem;
}

/* Sidebar Navigation */
.sidebar-nav {
    flex: 1;
    padding: 1rem 0;
    overflow-y: auto;
}

.nav-section {
    margin-bottom: 1.5rem;
}

.nav-section-title {
    color: rgba(255, 255, 255, 0.4);
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    padding: 0.5rem 1.5rem;
    overflow: hidden;
    white-space: nowrap;
    transition: opacity var(--transition-speed) ease;
}

.sidebar.collapsed .nav-section-title {
    opacity: 0;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.875rem 1.5rem;
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    cursor: pointer;
    transition: all 0.2s ease;
    border-left: 3px solid transparent;
    position: relative;
}

.nav-item:hover {
    background: var(--sidebar-hover);
    color: var(--white);
}

.nav-item.active {
    background: var(--sidebar-active);
    color: var(--white);
    border-left-color: var(--green-vibrant);
}

.nav-item-icon {
    font-size: 1.25rem;
    width: 28px;
    text-align: center;
    flex-shrink: 0;
}

.nav-item-text {
    font-size: 0.9rem;
    font-weight: 500;
    overflow: hidden;
    white-space: nowrap;
    transition: opacity var(--transition-speed) ease;
}

.sidebar.collapsed .nav-item-text {
    opacity: 0;
    width: 0;
}

.nav-item-badge {
    margin-left: auto;
    font-size: 0.65rem;
    background: var(--orange);
    color: var(--white);
    padding: 0.15rem 0.5rem;
    border-radius: 10px;
    font-weight: 600;
    transition: opacity var(--transition-speed) ease;
}

.sidebar.collapsed .nav-item-badge {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    padding: 0.1rem 0.3rem;
}

/* Sidebar Toggle */
.sidebar-toggle {
    position: absolute;
    top: 1.5rem;
    right: -14px;
    width: 28px;
    height: 28px;
    background: var(--sidebar-bg);
    border: 2px solid var(--gray-200);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--white);
    font-size: 0.9rem;
    transition: all 0.2s ease;
    z-index: 10;
}

.sidebar-toggle:hover {
    background: var(--green-vibrant);
    border-color: var(--green-vibrant);
    transform: scale(1.1);
}

.sidebar.collapsed .sidebar-toggle {
    transform: rotate(180deg);
}

.sidebar.collapsed .sidebar-toggle:hover {
    transform: rotate(180deg) scale(1.1);
}

/* Sidebar Footer */
.sidebar-footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.sidebar-footer-text {
    color: rgba(255, 255, 255, 0.4);
    font-size: 0.7rem;
    text-align: center;
    overflow: hidden;
    white-space: nowrap;
    transition: opacity var(--transition-speed) ease;
}

.sidebar.collapsed .sidebar-footer-text {
    opacity: 0;
}

/* ===============================
   MAIN CONTENT
   =============================== */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    transition: margin-left var(--transition-speed) ease;
    min-height: 100vh;
}

.sidebar.collapsed ~ .main-content {
    margin-left: var(--sidebar-collapsed-width);
}

/* Content Header */
.content-header {
    background: linear-gradient(135deg, var(--green-dark) 0%, var(--green-vibrant) 100%);
    padding: 1.5rem 2rem;
    position: relative;
    overflow: hidden;
}

.content-header::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
    border-radius: 50%;
}

.content-header-inner {
    position: relative;
    z-index: 1;
}

.content-header h1 {
    color: var(--white);
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
}

.content-header p {
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.9rem;
}

/* Content Body */
.content-body {
    padding: 2rem;
    max-width: 1400px;
}

/* Section Wrapper */
.section-wrapper {
    display: none;
}

.section-wrapper.active {
    display: block;
    animation: fadeIn 0.3s ease;
}

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

/* ===============================
   COMMON COMPONENTS
   =============================== */

/* Cards */
.card {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: 16px;
    padding: 1.5rem;
    box-shadow: var(--shadow);
}

.card-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.card-title::before {
    content: '';
    width: 4px;
    height: 20px;
    background: var(--green-vibrant);
    border-radius: 2px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 10px;
    font-size: 1rem;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-primary {
    background: linear-gradient(135deg, var(--green-dark) 0%, var(--green-vibrant) 100%);
    color: var(--white);
    box-shadow: 0 4px 15px rgba(34, 139, 34, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(34, 139, 34, 0.4);
}

.btn-primary:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
}

.btn-secondary {
    background: var(--gray-100);
    color: var(--gray-700);
    border: 2px solid var(--gray-200);
}

.btn-secondary:hover {
    background: var(--gray-200);
}

/* Form Elements */
.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--gray-700);
}

.form-group select,
.form-group input {
    padding: 0.75rem 1rem;
    border: 2px solid var(--gray-200);
    border-radius: 10px;
    font-size: 1rem;
    font-family: inherit;
    background: var(--white);
    color: var(--gray-900);
    transition: all 0.2s ease;
}

.form-group select:focus,
.form-group input:focus {
    outline: none;
    border-color: var(--green-vibrant);
    box-shadow: 0 0 0 4px var(--green-glow);
}

.form-group select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%236b7280'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M19 9l-7 7-7-7'%3E%3C/path%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    background-size: 1.25rem;
    padding-right: 2.5rem;
}

/* Grid */
.grid {
    display: grid;
    gap: 1.5rem;
}

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

.grid-3 {
    grid-template-columns: repeat(3, 1fr);
}

.grid-4 {
    grid-template-columns: repeat(4, 1fr);
}

.grid-auto {
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

/* Spinner */
.spinner {
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255,255,255,0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* Status Messages */
.status {
    padding: 1rem 1.25rem;
    border-radius: 10px;
    margin-top: 1rem;
    font-size: 0.9rem;
    display: none;
}

.status.show {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.status.loading {
    background: var(--orange-light);
    color: var(--orange);
    border: 1px solid var(--orange);
}

.status.success {
    background: var(--green-light);
    color: var(--green-dark);
    border: 1px solid var(--green-vibrant);
}

.status.error {
    background: #fef2f2;
    color: #dc2626;
    border: 1px solid #fca5a5;
}

/* ===============================
   LIGHTBOX
   =============================== */
.lightbox {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.9);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 2rem;
}

.lightbox.show {
    display: flex;
}

.lightbox img {
    max-width: 100%;
    max-height: 90vh;
    border-radius: 8px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.5);
}

.lightbox-close {
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    width: 48px;
    height: 48px;
    background: var(--white);
    border: none;
    border-radius: 50%;
    font-size: 1.5rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}

.lightbox-close:hover {
    background: var(--green-vibrant);
    color: var(--white);
}

.lightbox-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 56px;
    height: 56px;
    background: rgba(255,255,255,0.9);
    border: none;
    border-radius: 50%;
    font-size: 2rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
    color: var(--gray-700);
    z-index: 1001;
}

.lightbox-nav:hover {
    background: var(--green-vibrant);
    color: var(--white);
    transform: translateY(-50%) scale(1.1);
}

.lightbox-prev { left: 1.5rem; }
.lightbox-next { right: 1.5rem; }

.lightbox-counter {
    position: absolute;
    bottom: 1.5rem;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0,0,0,0.7);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    font-family: 'Space Mono', monospace;
}

/* ===============================
   RESPONSIVE
   =============================== */
@media (max-width: 1024px) {
    .sidebar {
        width: var(--sidebar-collapsed-width);
    }
    
    .sidebar .sidebar-brand,
    .sidebar .nav-section-title,
    .sidebar .nav-item-text,
    .sidebar .sidebar-footer-text {
        opacity: 0;
        width: 0;
    }
    
    .main-content {
        margin-left: var(--sidebar-collapsed-width);
    }
    
    .grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
        width: var(--sidebar-width);
    }
    
    .sidebar.mobile-open {
        transform: translateX(0);
    }
    
    .sidebar .sidebar-brand,
    .sidebar .nav-section-title,
    .sidebar .nav-item-text,
    .sidebar .sidebar-footer-text {
        opacity: 1;
        width: auto;
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .content-body {
        padding: 1rem;
    }
    
    .grid-2, .grid-3, .grid-4 {
        grid-template-columns: 1fr;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
}

/* Mobile Menu Button (hidden by default) */
.mobile-menu-btn {
    display: none;
    position: fixed;
    top: 1rem;
    left: 1rem;
    z-index: 101;
    width: 44px;
    height: 44px;
    background: var(--sidebar-bg);
    border: none;
    border-radius: 10px;
    color: var(--white);
    font-size: 1.5rem;
    cursor: pointer;
    align-items: center;
    justify-content: center;
}