/* All-in-One Tools - Modern SaaS Design */
/* Theme Variables */
:root {
    --primary: #000000;
    --secondary: #ffffff;
    --accent: #3b82f6;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --bg-primary: #ffffff;
    --bg-secondary: #f9fafb;
    --bg-card: #ffffff;
    --text-primary: #111827;
    --text-secondary: #6b7280;
    --border: #e5e7eb;
    --shadow: rgba(0, 0, 0, 0.1);
}

[data-theme="dark"] {
    --primary: #ffffff;
    --secondary: #000000;
    --accent: #3b82f6;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-card: #1e293b;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --border: #334155;
    --shadow: rgba(0, 0, 0, 0.3);
}

[data-theme="blue"] {
    --primary: #1e40af;
    --secondary: #dbeafe;
    --accent: #3b82f6;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --bg-primary: #eff6ff;
    --bg-secondary: #dbeafe;
    --bg-card: #ffffff;
    --text-primary: #1e3a8a;
    --text-secondary: #3b82f6;
    --border: #93c5fd;
    --shadow: rgba(59, 130, 246, 0.1);
}

[data-theme="purple"] {
    --primary: #7c3aed;
    --secondary: #ede9fe;
    --accent: #8b5cf6;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --bg-primary: #faf5ff;
    --bg-secondary: #f3e8ff;
    --bg-card: #ffffff;
    --text-primary: #5b21b6;
    --text-secondary: #7c3aed;
    --border: #c4b5fd;
    --shadow: rgba(124, 58, 237, 0.1);
}

/* Reset & Base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* Header */
.header {
    background: var(--bg-card);
    border-bottom: 1px solid var(--border);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 8px var(--shadow);
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent);
    text-decoration: none;
}

.nav-menu {
    display: flex;
    gap: 1.5rem;
    list-style: none;
    align-items: center;
}

.nav-menu a {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-menu a:hover {
    color: var(--accent);
}

.theme-switcher {
    display: flex;
    gap: 0.5rem;
}

.theme-btn {
    width: 32px;
    height: 32px;
    border: 2px solid var(--border);
    border-radius: 50%;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.theme-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 2px 8px var(--shadow);
}

.theme-btn.active {
    box-shadow: 0 0 0 3px var(--accent);
}

.theme-btn.light { background: linear-gradient(135deg, #ffffff 50%, #000000 50%); }
.theme-btn.dark { background: linear-gradient(135deg, #0f172a 50%, #f1f5f9 50%); }
.theme-btn.blue { background: linear-gradient(135deg, #3b82f6 50%, #dbeafe 50%); }
.theme-btn.purple { background: linear-gradient(135deg, #7c3aed 50%, #ede9fe 50%); }

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
}

/* Cards */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: 0 4px 6px var(--shadow);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 12px var(--shadow);
}

.card-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.card-description {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

/* Form Elements */
.form-group {
    margin-bottom: 1.5rem;
}

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-primary);
}

.form-input,
.form-textarea,
.form-select {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 1rem;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

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

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    text-align: center;
}

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

.btn-primary:hover {
    background: #2563eb;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

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

.btn-success:hover {
    background: #059669;
}

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

.btn-danger:hover {
    background: #dc2626;
}

.btn-secondary {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border);
}

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

.btn-group {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

/* Checkbox & Options */
.checkbox-group {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 1rem;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    user-select: none;
}

.checkbox-label input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
}

/* Output Box */
.output-box {
    background: var(--bg-secondary);
    border: 2px solid var(--border);
    border-radius: 8px;
    padding: 1rem;
    font-family: 'Courier New', monospace;
    font-size: 1.25rem;
    text-align: center;
    min-height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    word-break: break-all;
}

.output-box:hover {
    border-color: var(--accent);
    background: var(--bg-card);
}

.output-box.clickable:active {
    transform: scale(0.98);
}

/* Grid Layout */
.grid-2 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

/* Timer Display */
.timer-display {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin-top: 1rem;
}

.timer-circle {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    border: 4px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--accent);
}

/* Loading Spinner */
.spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 0.8s linear infinite;
}

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

/* Alert Messages */
.alert {
    padding: 1rem 1.5rem;
    border-radius: 8px;
    margin-bottom: 1rem;
    font-weight: 500;
}

.alert-success {
    background: #d1fae5;
    color: #065f46;
    border: 1px solid #10b981;
}

.alert-error {
    background: #fee2e2;
    color: #991b1b;
    border: 1px solid #ef4444;
}

.alert-info {
    background: #dbeafe;
    color: #1e40af;
    border: 1px solid #3b82f6;
}

/* Table */
.table-container {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
}

th, td {
    padding: 0.75rem;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

th {
    background: var(--bg-secondary);
    font-weight: 600;
    color: var(--text-primary);
}

tr:hover {
    background: var(--bg-secondary);
}

/* Badge */
.badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: 12px;
    font-size: 0.875rem;
    font-weight: 600;
}

.badge-success {
    background: #d1fae5;
    color: #065f46;
}

.badge-danger {
    background: #fee2e2;
    color: #991b1b;
}

.badge-warning {
    background: #fef3c7;
    color: #92400e;
}

/* Modal/Popup */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    padding: 1rem;
}

.modal-content {
    background: var(--bg-card);
    border-radius: 12px;
    padding: 2rem;
    max-width: 500px;
    width: 100%;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

.modal-close {
    float: right;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-secondary);
}

.modal-close:hover {
    color: var(--text-primary);
}

/* Hamburger Menu */
.hamburger-menu {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    z-index: 1001;
}

.hamburger-menu span {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: all 0.3s ease;
}

.hamburger-menu.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.hamburger-menu.active span:nth-child(2) {
    opacity: 0;
}

.hamburger-menu.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

/* Mobile Menu Overlay */
.mobile-menu-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 999;
    display: none;
}

.mobile-menu-overlay.active {
    display: block;
}

/* Responsive */
@media (max-width: 768px) {
    .header-container {
        justify-content: space-between;
    }
    
    .hamburger-menu {
        display: flex;
        order: 2;
    }
    
    .logo {
        order: 1;
    }
    
    .theme-switcher {
        order: 3;
    }
    
    nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background: var(--bg-card);
        box-shadow: -2px 0 10px var(--shadow);
        z-index: 1000;
        transition: right 0.3s ease;
        padding-top: 80px;
    }
    
    nav.active {
        right: 0;
    }
    
    .nav-menu {
        flex-direction: column;
        gap: 0;
        padding: 1rem 0;
    }
    
    .nav-menu li {
        width: 100%;
    }
    
    .nav-menu a {
        display: block;
        padding: 1rem 1.5rem;
        border-bottom: 1px solid var(--border);
    }
    
    .grid-2 {
        grid-template-columns: 1fr;
    }
    
    .card {
        padding: 1.5rem;
    }
    
    .btn-group {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
    }
}

/* Utility Classes */
.text-center { text-align: center; }
.text-right { text-align: right; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.hidden { display: none; }
.flex { display: flex; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-1 { gap: 0.5rem; }
.gap-2 { gap: 1rem; }