/* ========================================
   eTodo - Ultra Modern Design
   Professional Gradient Theme with Animations
   ======================================== */

@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;600;700&display=swap');

:root {
    /* Primary Colors - Modern Blue Gradient */
    --primary: #667eea;
    --primary-dark: #5568d3;
    --secondary: #764ba2;
    --accent: #f093fb;

    /* Gradient Colors */
    --gradient-1: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-2: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-3: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --gradient-4: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
    --gradient-5: linear-gradient(135deg, #fa709a 0%, #fee140 100%);

    /* Glass morphism */
    --glass-bg: rgba(255, 255, 255, 0.1);
    --glass-border: rgba(255, 255, 255, 0.2);

    /* Neutral Colors */
    --dark: #1a1a2e;
    --dark-light: #16213e;
    --text-primary: #2d3748;
    --text-secondary: #718096;
    --text-light: #a0aec0;
    --bg-main: #f7fafc;
    --bg-card: #ffffff;
    --border: #e2e8f0;

    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.05);
    --shadow: 0 4px 6px rgba(0,0,0,0.07);
    --shadow-md: 0 10px 25px rgba(0,0,0,0.1);
    --shadow-lg: 0 20px 40px rgba(0,0,0,0.15);
    --shadow-xl: 0 25px 50px rgba(0,0,0,0.2);

    /* Glow Effects */
    --glow-primary: 0 0 20px rgba(102, 126, 234, 0.5);
    --glow-secondary: 0 0 20px rgba(118, 75, 162, 0.5);

    /* Transitions */
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg-main);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* ========== Animated Background ========== */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
    opacity: 0.03;
    z-index: -1;
    animation: gradientShift 15s ease infinite;
}

@keyframes gradientShift {
    0%, 100% { transform: translateX(0) translateY(0); }
    25% { transform: translateX(5%) translateY(5%); }
    50% { transform: translateX(-5%) translateY(5%); }
    75% { transform: translateX(5%) translateY(-5%); }
}

/* ========== Navbar - Modern Glass Effect ========== */
.navbar {
    background: var(--gradient-1) !important;
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-md);
    padding: 1rem 0;
    transition: all var(--transition-base);
    position: sticky;
    top: 0;
    z-index: 9999;
}

.navbar-collapse {
    z-index: 10000;
}

.dropdown-menu {
    z-index: 10001 !important;
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.5rem;
    color: white !important;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: all var(--transition-fast);
}

.navbar-brand:hover {
    transform: translateY(-2px);
    filter: drop-shadow(var(--glow-primary));
}

.nav-link {
    color: rgba(255, 255, 255, 0.9) !important;
    font-weight: 500;
    padding: 0.5rem 1rem !important;
    border-radius: 8px;
    transition: all var(--transition-fast);
    position: relative;
}

.nav-link::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: white;
    transition: all var(--transition-base);
    transform: translateX(-50%);
}

.nav-link:hover::before {
    width: 80%;
}

.nav-link:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
}

/* ========== Cards - Modern 3D Effect ========== */
.card {
    background: var(--bg-card);
    border: none;
    border-radius: 16px;
    box-shadow: var(--shadow);
    transition: all var(--transition-base);
    overflow: hidden;
    position: relative;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--gradient-1);
    transform: scaleX(0);
    transition: transform var(--transition-base);
}

.card:hover::before {
    transform: scaleX(1);
}

.card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.card-header {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
    border: none;
    padding: 1.25rem 1.5rem;
    font-weight: 600;
    border-radius: 16px 16px 0 0 !important;
    border-bottom: 2px solid rgba(102, 126, 234, 0.1);
}

.card-body {
    padding: 1.5rem;
}

/* ========== Buttons - Gradient with Glow ========== */
.btn {
    border-radius: 10px;
    padding: 0.625rem 1.5rem;
    font-weight: 600;
    border: none;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
    text-transform: none;
    letter-spacing: 0.3px;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

.btn-primary {
    background: var(--gradient-1);
    color: white;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.6);
}

.btn-secondary {
    background: linear-gradient(135deg, #6c757d 0%, #5a6268 100%);
    color: white;
}

.btn-success {
    background: var(--gradient-4);
    color: white;
    box-shadow: 0 4px 15px rgba(67, 233, 123, 0.4);
}

.btn-danger {
    background: var(--gradient-2);
    color: white;
    box-shadow: 0 4px 15px rgba(245, 87, 108, 0.4);
}

.btn-info {
    background: var(--gradient-3);
    color: white;
}

.btn-warning {
    background: var(--gradient-5);
    color: white;
}

.btn-outline-primary {
    border: 2px solid var(--primary);
    color: var(--primary);
    background: transparent;
}

.btn-outline-primary:hover {
    background: var(--gradient-1);
    color: white;
    border-color: transparent;
}

.btn-sm {
    padding: 0.4rem 1rem;
    font-size: 0.875rem;
}

.btn-lg {
    padding: 0.875rem 2rem;
    font-size: 1.125rem;
}

/* ========== Forms - Modern Input Design ========== */
.form-control, .form-select {
    border: 2px solid var(--border);
    border-radius: 10px;
    padding: 0.75rem 1rem;
    font-size: 0.9375rem;
    transition: all var(--transition-base);
    background: var(--bg-card);
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.1);
    background: white;
    transform: translateY(-2px);
}

.form-label {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.form-check-input {
    width: 1.25rem;
    height: 1.25rem;
    border: 2px solid var(--border);
    transition: all var(--transition-fast);
}

.form-check-input:checked {
    background: var(--gradient-1);
    border-color: var(--primary);
}

.form-check-input:focus {
    box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.1);
}

/* ========== Badges - Modern Pills ========== */
.badge {
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-weight: 600;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-fast);
}

.badge:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.bg-danger {
    background: var(--gradient-2) !important;
}

.bg-warning {
    background: var(--gradient-5) !important;
}

.bg-success {
    background: var(--gradient-4) !important;
}

.bg-info {
    background: var(--gradient-3) !important;
}

.bg-primary {
    background: var(--gradient-1) !important;
}

.bg-secondary {
    background: linear-gradient(135deg, #6c757d 0%, #5a6268 100%) !important;
}

/* ========== Task Cards - Ultra Modern ========== */
.task-card {
    background: var(--bg-card);
    border-radius: 12px;
    padding: 1.25rem;
    border-left: 4px solid transparent;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.task-card::after {
    content: '';
    position: absolute;
    top: 0;
    right: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(102, 126, 234, 0.05), transparent);
    transition: right 0.5s;
}

.task-card:hover::after {
    right: 100%;
}

.task-card:hover {
    border-left-color: var(--primary);
    transform: translateX(8px);
    box-shadow: var(--shadow-md);
}

/* ========== List Group - Modern List Design ========== */
.list-group-item {
    border: none;
    border-radius: 12px;
    margin-bottom: 0.75rem;
    background: var(--bg-card);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
    padding: 1rem 1.25rem;
}

.list-group-item:hover {
    box-shadow: var(--shadow-md);
    transform: translateX(8px);
}

/* ========== Quick Add Bar - Glass Effect ========== */
.quick-add-bar {
    background: linear-gradient(135deg, rgba(255,255,255,0.9) 0%, rgba(255,255,255,0.95) 100%);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(102, 126, 234, 0.1);
    border-radius: 16px;
    padding: 1.5rem;
    box-shadow: var(--shadow-md);
    margin-bottom: 2rem;
    animation: slideInDown 0.5s ease;
}

@keyframes slideInDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ========== Kanban Board ========== */
.kanban-column {
    background: linear-gradient(135deg, rgba(255,255,255,0.8) 0%, rgba(247,250,252,0.9) 100%);
    border-radius: 16px;
    padding: 1.25rem;
    min-height: 400px;
    transition: all var(--transition-base);
    border: 2px dashed var(--border);
}

.kanban-column:hover {
    border-color: var(--primary);
    background: rgba(102, 126, 234, 0.05);
}

.kanban-task {
    background: white;
    border-radius: 12px;
    padding: 1rem;
    margin-bottom: 1rem;
    cursor: grab;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-sm);
    border: 2px solid transparent;
}

.kanban-task:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-md);
    transform: rotate(2deg) scale(1.02);
}

.kanban-task:active {
    cursor: grabbing;
    transform: rotate(5deg) scale(1.05);
}

/* ========== Dashboard Stats Cards ========== */
.stat-card {
    border-radius: 16px;
    padding: 1.75rem;
    color: white;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    transition: all var(--transition-base);
}

.stat-card::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.15) 0%, transparent 70%);
    animation: pulse 3s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 0.5; }
    50% { transform: scale(1.1); opacity: 0.8; }
}

.stat-card:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: var(--shadow-xl);
}

/* ========== Modal - Modern Design ========== */
.modal-content {
    border-radius: 20px;
    border: none;
    box-shadow: var(--shadow-xl);
    overflow: hidden;
}

.modal-header {
    background: var(--gradient-1);
    color: white;
    border: none;
    padding: 1.5rem;
}

.modal-header .btn-close {
    filter: brightness(0) invert(1);
    opacity: 0.8;
    transition: all var(--transition-fast);
}

.modal-header .btn-close:hover {
    opacity: 1;
    transform: rotate(90deg);
}

.modal-body {
    padding: 2rem;
}

/* ========== Toast Notifications ========== */
.toast {
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
    border: none;
    backdrop-filter: blur(10px);
    animation: slideInRight 0.4s ease;
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(100%);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* ========== Animations ========== */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeIn 0.5s ease;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in-up {
    animation: fadeInUp 0.6s ease;
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.scale-in {
    animation: scaleIn 0.4s ease;
}

/* ========== Scrollbar - Custom Design ========== */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: var(--bg-main);
    border-radius: 10px;
}

::-webkit-scrollbar-thumb {
    background: var(--gradient-1);
    border-radius: 10px;
    transition: all var(--transition-fast);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--gradient-2);
}

/* ========== Footer ========== */
.footer {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.05) 0%, rgba(118, 75, 162, 0.05) 100%);
    border-top: 2px solid rgba(102, 126, 234, 0.1);
    padding: 2rem 0;
    margin-top: 4rem;
}

/* ========== Utilities ========== */
.text-gradient {
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.glass {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.glow {
    box-shadow: var(--glow-primary);
}

/* ========== Responsive Design ========== */
@media (max-width: 768px) {
    html {
        font-size: 14px;
    }

    .card {
        border-radius: 12px;
        margin-bottom: 1rem;
    }

    .btn {
        padding: 0.5rem 1.25rem;
        font-size: 0.875rem;
    }

    .quick-add-bar {
        padding: 1.25rem;
    }

    .stat-card {
        margin-bottom: 1rem;
    }

    .navbar-brand {
        font-size: 1.25rem;
    }

    .kanban-column {
        min-height: 300px;
        margin-bottom: 1.5rem;
    }

    .modal-body {
        padding: 1.5rem;
    }

    .task-card:hover {
        transform: translateX(4px);
    }

    .list-group-item:hover {
        transform: translateX(4px);
    }

    /* Fix menu mobile z-index */
    .navbar-collapse {
        background: var(--gradient-1);
        padding: 1rem;
        border-radius: 12px;
        margin-top: 1rem;
        box-shadow: var(--shadow-lg);
        position: relative;
        z-index: 10000 !important;
    }

    .navbar-nav {
        gap: 0.5rem;
    }

    /* Task description truncate */
    .task-description-truncate {
        display: -webkit-box;
        -webkit-line-clamp: 1;
        -webkit-box-orient: vertical;
        overflow: hidden;
        text-overflow: ellipsis;
        line-height: 1.5;
        max-height: 1.5em;
    }

    .task-description-full {
        display: block;
    }

    .navbar-nav .nav-link {
        padding: 0.75rem !important;
        border-radius: 8px;
    }

    .dropdown-menu {
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(10px);
        border: none;
        box-shadow: var(--shadow-lg);
        z-index: 10001 !important;
    }
}

/* ========== Print Styles ========== */
@media print {
    .navbar, .footer, .btn {
        display: none !important;
    }

    .card {
        box-shadow: none;
        border: 1px solid #ddd;
    }
}