/**
 * MITS Alumni Portal - Main Stylesheet
 * Red (#d8151c) & White Modern Design System
 */

:root {
    --primary-color: #d8151c;
    --primary-hover: #b91016;
    --primary-dark: #990c12;
    --primary-light: #fef2f2;
    --primary-subtle: #fee2e2;
    --primary-border: #fecaca;
    --accent-color: #ef4444;
    --accent-hover: #dc2626;
    --surface-bg: #fcfcfd;
    --card-bg: #ffffff;
    --border-color: #f1f5f9;
    --border-subtle: #e2e8f0;
    --text-primary: #0f172a;
    --text-secondary: #64748b;
    --brand-gradient: linear-gradient(135deg, #d8151c 0%, #b91016 100%);
    --brand-gradient-glow: linear-gradient(135deg, #d8151c 0%, #ff3b44 100%);
    --shadow-subtle: 0 1px 3px 0 rgba(0, 0, 0, 0.04), 0 1px 2px -1px rgba(0, 0, 0, 0.04);
    --shadow-card: 0 4px 6px -1px rgba(0, 0, 0, 0.04), 0 2px 4px -2px rgba(0, 0, 0, 0.03);
    --shadow-elevated: 0 10px 20px -3px rgba(216, 21, 28, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
}

/* -------------------------------------------------------------
 * 1. Base & Typography
 * ------------------------------------------------------------- */
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    color: var(--text-primary);
    background-color: var(--surface-bg);
    line-height: 1.6;
    letter-spacing: -0.01em;
}

h1, h2, h3, h4, h5, h6, .font-heading {
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--text-primary);
}

.bg-surface {
    background-color: var(--surface-bg) !important;
}

.text-gradient {
    background: var(--brand-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.line-height-tight {
    line-height: 1.25;
}

/* Bootstrap 5 Color Overrides for Red Theme */
.text-primary {
    color: var(--primary-color) !important;
}

.bg-primary {
    background-color: var(--primary-color) !important;
    color: #ffffff !important;
}

.bg-primary-subtle {
    background-color: var(--primary-light) !important;
    color: var(--primary-color) !important;
}

.border-primary-subtle {
    border-color: var(--primary-border) !important;
}

/* -------------------------------------------------------------
 * 2. Navbar Styling & Glassmorphism
 * ------------------------------------------------------------- */
.navbar-glass {
    background-color: rgba(255, 255, 255, 0.94);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-subtle);
    transition: background-color 0.3s ease;
}

.brand-icon-box {
    width: 38px;
    height: 38px;
    background: var(--brand-gradient);
    color: #ffffff;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.15rem;
    box-shadow: 0 4px 12px rgba(216, 21, 28, 0.28);
}

.brand-logo-img {
    width: 38px;
    height: 38px;
    object-fit: contain;
    border-radius: 8px;
    background-color: #ffffff;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.brand-logo-img:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 12px rgba(216, 21, 28, 0.2);
}

.navbar .nav-link {
    font-weight: 500;
    color: var(--text-secondary);
    border-radius: 8px;
    padding: 0.5rem 0.85rem;
    transition: all 0.2s ease;
}

.navbar .nav-link:hover,
.navbar .nav-link.active {
    color: var(--primary-color);
    background-color: var(--primary-light);
}

.nav-avatar {
    width: 34px;
    height: 34px;
    object-fit: cover;
}

.user-name-label {
    font-size: 0.875rem;
    max-width: 130px;
}

.user-role-label {
    font-size: 0.725rem;
}

.user-dropdown-menu {
    min-width: 230px;
    border: 1px solid var(--border-subtle);
}

.user-dropdown-menu .dropdown-item {
    font-size: 0.9rem;
    font-weight: 500;
    padding-left: 1rem;
    padding-right: 1rem;
    transition: background-color 0.15s ease;
}

.user-dropdown-menu .dropdown-item:hover {
    background-color: var(--primary-light);
    color: var(--primary-color);
}

/* -------------------------------------------------------------
 * 3. Modern Cards & Containers
 * ------------------------------------------------------------- */
.card-modern {
    background: var(--card-bg);
    border: 1px solid var(--border-subtle);
    border-radius: 1rem;
    box-shadow: var(--shadow-card);
    transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.card-hover:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-elevated);
    border-color: var(--primary-border);
}

.card-header-clean {
    background: transparent;
    border-bottom: 1px solid var(--border-subtle);
    padding: 1.25rem 1.5rem;
}

.card-body-clean {
    padding: 1.5rem;
}

/* -------------------------------------------------------------
 * 4. Hero Section & Feature Cards
 * ------------------------------------------------------------- */
.hero-section {
    background: radial-gradient(100% 100% at 50% 0%, rgba(216, 21, 28, 0.05) 0%, rgba(255, 255, 255, 0) 100%);
    border-bottom: 1px solid var(--border-subtle);
    padding: 4.5rem 0 3.5rem;
}

.badge-hero {
    background-color: var(--primary-light);
    color: var(--primary-color);
    font-weight: 600;
    border: 1px solid var(--primary-border);
}

.stat-card {
    background: #ffffff;
    border: 1px solid var(--border-subtle);
    border-radius: 1rem;
    padding: 1.5rem;
    text-align: center;
    box-shadow: var(--shadow-card);
    transition: transform 0.2s ease;
}

.stat-card:hover {
    transform: translateY(-2px);
    border-color: var(--primary-border);
}

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1.35rem;
    margin-bottom: 0.75rem;
}

/* -------------------------------------------------------------
 * 5. Buttons & Interactive Elements
 * ------------------------------------------------------------- */
.btn-primary {
    background-color: var(--primary-color) !important;
    border-color: var(--primary-color) !important;
    color: #ffffff !important;
    font-weight: 600;
    transition: all 0.2s ease;
}

.btn-primary:hover,
.btn-primary:focus {
    background-color: var(--primary-hover) !important;
    border-color: var(--primary-hover) !important;
    transform: translateY(-1px);
    box-shadow: 0 4px 14px rgba(216, 21, 28, 0.35) !important;
    color: #ffffff !important;
}

.btn-outline-primary {
    color: var(--primary-color) !important;
    border-color: var(--primary-color) !important;
    font-weight: 600;
    background-color: transparent;
}

.btn-outline-primary:hover,
.btn-outline-primary:focus {
    background-color: var(--primary-color) !important;
    border-color: var(--primary-color) !important;
    color: #ffffff !important;
    box-shadow: 0 4px 12px rgba(216, 21, 28, 0.25);
}

.btn-icon {
    width: 40px;
    height: 40px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0;
}

/* Form Controls */
.form-control:focus,
.form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.25rem rgba(216, 21, 28, 0.15);
}

/* -------------------------------------------------------------
 * 6. Avatars
 * ------------------------------------------------------------- */
.avatar-sm {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    object-fit: cover;
}

.avatar-md {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    object-fit: cover;
}

.avatar-lg {
    width: 68px;
    height: 68px;
    border-radius: 50%;
    object-fit: cover;
}

.avatar-xl {
    width: 96px;
    height: 96px;
    border-radius: 50%;
    object-fit: cover;
}

/* -------------------------------------------------------------
 * 7. Badges & Tags
 * ------------------------------------------------------------- */
.skill-tag {
    display: inline-block;
    background-color: var(--primary-light);
    color: var(--primary-color);
    border: 1px solid var(--primary-border);
    font-size: 0.8rem;
    font-weight: 600;
    padding: 0.25rem 0.65rem;
    border-radius: 9999px;
    margin-right: 0.35rem;
    margin-bottom: 0.35rem;
}

/* -------------------------------------------------------------
 * 8. Utilities & Footer
 * ------------------------------------------------------------- */
.hover-primary:hover {
    color: var(--primary-color) !important;
}

.footer {
    border-top: 1px solid var(--border-subtle);
    background-color: #ffffff !important;
}