/* Readufive Project Tracker - Main Stylesheet */

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

html {
    scroll-behavior: smooth;
}

:root {
    --primary-color: #6366f1;
    --primary-dark: #4f46e5;
    --secondary-color: #8b5cf6;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --info-color: #3b82f6;
    --light-color: #f8fafc;
    --dark-color: #0f172a;
    --border-color: #e2e8f0;
    --text-color: #0f172a;
    --text-light: #64748b;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 20px 25px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: var(--light-color);
    color: var(--text-color);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    line-height: 1.2;
    margin-bottom: 0.5rem;
    color: var(--text-color);
    font-weight: 700;
    letter-spacing: -0.025em;
}

h1 { font-size: 32px; }
h2 { font-size: 24px; }
h3 { font-size: 20px; font-weight: 600; }
h4 { font-size: 16px; font-weight: 600; }
h5 { font-size: 14px; font-weight: 600; }
h6 { font-size: 12px; font-weight: 600; }

p {
    margin-bottom: 1rem;
    color: var(--text-color);
}

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

a:hover {
    color: var(--secondary-color);
    text-decoration: underline;
}

/* Layout */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.container-fluid {
    width: 100%;
    padding: 0 20px;
}

/* Grid */
.row {
    display: flex;
    flex-wrap: wrap;
    margin-right: -10px;
    margin-left: -10px;
}

.col {
    flex: 1;
    padding-right: 10px;
    padding-left: 10px;
    min-width: 0;
}

.col-1 { flex: 0 0 8.333%; }
.col-2 { flex: 0 0 16.666%; }
.col-3 { flex: 0 0 25%; }
.col-4 { flex: 0 0 33.333%; }
.col-5 { flex: 0 0 41.666%; }
.col-6 { flex: 0 0 50%; }
.col-7 { flex: 0 0 58.333%; }
.col-8 { flex: 0 0 66.666%; }
.col-9 { flex: 0 0 75%; }
.col-10 { flex: 0 0 83.333%; }
.col-11 { flex: 0 0 91.666%; }
.col-12 { flex: 0 0 100%; }

/* Forms */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-color);
    font-weight: 500;
    font-size: 14px;
}

.form-control,
.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 14px;
    font-family: inherit;
    transition: var(--transition);
}

.form-control:focus,
.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.form-control:disabled {
    background-color: #f5f5f5;
    cursor: not-allowed;
    opacity: 0.6;
}

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

/* Buttons */
.btn {
    display: inline-block;
    padding: 10px 16px;
    border: none;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    text-align: center;
    white-space: nowrap;
    user-select: none;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
}

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

.btn-secondary {
    background-color: var(--text-light);
    color: white;
}

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

.btn-success {
    background-color: var(--success-color);
    color: white;
}

.btn-success:hover {
    background-color: #38a169;
}

.btn-danger {
    background-color: var(--danger-color);
    color: white;
}

.btn-danger:hover {
    background-color: #e53e3e;
}

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

.btn-warning:hover {
    background-color: #dd6b20;
}

.btn-outline {
    background-color: transparent;
    border: 1px solid currentColor;
    color: var(--primary-color);
}

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

.btn-sm {
    padding: 6px 12px;
    font-size: 12px;
}

.btn-lg {
    padding: 12px 20px;
    font-size: 16px;
}

/* Cards */
.card {
    background-color: white;
    border-radius: 8px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.card:hover {
    box-shadow: var(--shadow-md);
}

.card-header {
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
}

.card-body {
    padding: 20px;
}

.card-footer {
    padding: 20px;
    border-top: 1px solid var(--border-color);
    background-color: var(--light-color);
}

.card-title {
    font-size: 18px;
    font-weight: 600;
    margin: 0;
    color: var(--text-color);
}

.card-subtitle {
    font-size: 13px;
    color: var(--text-light);
    margin: 5px 0 0 0;
}

/* Alerts */
.alert {
    padding: 15px 20px;
    margin-bottom: 20px;
    border-radius: 6px;
    border-left: 4px solid;
}

.alert-danger {
    background-color: #fee;
    border-color: var(--danger-color);
    color: #c00;
}

.alert-success {
    background-color: #efe;
    border-color: var(--success-color);
    color: #060;
}

.alert-warning {
    background-color: #ffe;
    border-color: var(--warning-color);
    color: #880;
}

.alert-info {
    background-color: #eef;
    border-color: var(--info-color);
    color: #006;
}

/* Tables */
.table {
    width: 100%;
    border-collapse: collapse;
    background-color: white;
}

.table thead {
    background-color: var(--light-color);
}

.table th {
    padding: 12px 20px;
    text-align: left;
    font-weight: 600;
    color: var(--text-color);
    border-bottom: 2px solid var(--border-color);
}

.table td {
    padding: 12px 20px;
    border-bottom: 1px solid var(--border-color);
}

.table tbody tr:hover {
    background-color: #f9f9f9;
}

/* Badges */
.badge {
    display: inline-block;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 600;
    white-space: nowrap;
}

.badge-primary { background-color: #c3dafe; color: #1e3a8a; }
.badge-secondary { background-color: #cbd5e0; color: #2d3748; }
.badge-success { background-color: #c6f6d5; color: #22543d; }
.badge-danger { background-color: #fed7d7; color: #742a2a; }
.badge-warning { background-color: #feebc8; color: #7c2d12; }
.badge-info { background-color: #bee3f8; color: #1e3a8a; }

/* Status Badges */
.status-completed { background-color: #c6f6d5; color: #22543d; }
.status-in-progress { background-color: #bee3f8; color: #1e3a8a; }
.status-finish { background: #e9d5ff; color: #6b21a8; }
.status-to-do { background-color: #cbd5e0; color: #2d3748; }
.status-on-hold { background-color: #fed7d7; color: #742a2a; }
.status-active { background-color: #c6f6d5; color: #22543d; }
.status-closed { background-color: #cbd5e0; color: #2d3748; }

/* Priority Badges */
.priority-high { background-color: #fed7d7; color: #742a2a; }
.priority-medium { background-color: #feebc8; color: #7c2d12; }
.priority-low { background-color: #c6f6d5; color: #22543d; }

/* Margin & Padding Utilities */
.m-0 { margin: 0; }
.m-1 { margin: 5px; }
.m-2 { margin: 10px; }
.m-3 { margin: 15px; }
.m-4 { margin: 20px; }

.mt-1 { margin-top: 5px; }
.mt-2 { margin-top: 10px; }
.mt-3 { margin-top: 15px; }
.mt-4 { margin-top: 20px; }

.mb-1 { margin-bottom: 5px; }
.mb-2 { margin-bottom: 10px; }
.mb-3 { margin-bottom: 15px; }
.mb-4 { margin-bottom: 20px; }

.p-1 { padding: 5px; }
.p-2 { padding: 10px; }
.p-3 { padding: 15px; }
.p-4 { padding: 20px; }

.pt-1 { padding-top: 5px; }
.pt-2 { padding-top: 10px; }
.pt-3 { padding-top: 15px; }
.pt-4 { padding-top: 20px; }

.pb-1 { padding-bottom: 5px; }
.pb-2 { padding-bottom: 10px; }
.pb-3 { padding-bottom: 15px; }
.pb-4 { padding-bottom: 20px; }

/* Text Utilities */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.text-muted { color: var(--text-light); }
.text-danger { color: var(--danger-color); }
.text-success { color: var(--success-color); }
.text-primary { color: var(--primary-color); }
.text-warning { color: var(--warning-color); }

.font-weight-bold { font-weight: 700; }
.font-weight-600 { font-weight: 600; }
.font-italic { font-style: italic; }

/* Loading Spinner */
.spinner {
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid rgba(102, 126, 234, 0.3);
    border-top: 2px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-right: 8px;
    vertical-align: middle;
}

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

/* Responsive */
@media (max-width: 768px) {
    .col-sm-1 { flex: 0 0 8.333%; }
    .col-sm-2 { flex: 0 0 16.666%; }
    .col-sm-3 { flex: 0 0 25%; }
    .col-sm-4 { flex: 0 0 33.333%; }
    .col-sm-6 { flex: 0 0 50%; }
    .col-sm-12 { flex: 0 0 100%; }

    h1 { font-size: 24px; }
    h2 { font-size: 20px; }
    h3 { font-size: 18px; }

    .container {
        padding: 0 15px;
    }
}

@media (max-width: 480px) {
    .col {
        flex: 0 0 100%;
    }

    h1 { font-size: 20px; }
    h2 { font-size: 18px; }

    .btn {
        width: 100%;
    }

    .table {
        font-size: 12px;
    }

    .table th,
    .table td {
        padding: 8px 10px;
    }
}

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
    body {
        background-color: #1a202c;
        color: #e2e8f0;
    }

    .card,
    .table {
        background-color: #2d3748;
    }

    .form-control,
    .form-group input,
    .form-group textarea,
    .form-group select {
        background-color: #4a5568;
        color: #e2e8f0;
        border-color: #4a5568;
    }

    .card-header,
    .card-footer,
    .table thead {
        background-color: #4a5568;
        border-color: #4a5568;
    }

    .table tbody tr:hover {
        background-color: #4a5568;
    }
}

/* Global Responsive Hardening */
img,
svg,
video,
canvas {
    max-width: 100%;
    height: auto;
}

@media (max-width: 992px) {
    .container,
    .container-fluid {
        padding-left: 14px;
        padding-right: 14px;
    }

    .row {
        margin-left: -8px;
        margin-right: -8px;
    }

    .col {
        padding-left: 8px;
        padding-right: 8px;
    }

    .card,
    .table,
    .alert {
        border-radius: 10px;
    }
}

@media (max-width: 768px) {
    .btn,
    .btn-sm,
    .btn-lg {
        min-height: 40px;
        line-height: 1.2;
    }

    .form-control,
    .form-group input,
    .form-group textarea,
    .form-group select {
        font-size: 16px;
    }

    .table {
        display: block;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        white-space: nowrap;
    }

    .table th,
    .table td {
        padding: 10px 12px;
    }
}

@media (max-width: 576px) {
    .container,
    .container-fluid {
        padding-left: 10px;
        padding-right: 10px;
    }

    .btn {
        width: 100%;
    }

    .card-header,
    .card-body,
    .card-footer {
        padding: 14px;
    }

    .alert {
        padding: 12px 14px;
    }
}