:root {
    --primary: #00b4d8;
    --primary-dark: #0096c7;
    --secondary: #caf0f8;
    --dark-bg: #121826;
    --dark-card: #1e293b;
    --dark-text: #e2e8f0;
    --light-bg: #f8fafc;
    --light-card: #ffffff;
    --light-text: #334155;
    --border: #33415533;
    --success: #10b981;
    --warning: #f59e0b;
    --card-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.05);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Inter', sans-serif;
    background: linear-gradient(135deg, var(--dark-bg) 0%, #0f172a 100%);
    color: var(--dark-text);
    min-height: 100vh;
    padding: 2rem 1rem;
    transition: var(--transition);
}

body.light-mode {
    background: linear-gradient(135deg, var(--light-bg) 0%, #e2e8f0 100%);
    color: var(--light-text);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
}

/* Header styles */
header {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    margin-bottom: 3rem;
    position: relative;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 1rem;
}

.logo-icon {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 6px -1px rgba(0, 180, 216, 0.2), 0 2px 4px -2px rgba(0, 180, 216, 0.2);
}

.logo-icon i {
    font-size: 24px;
    color: white;
}

h1 {
    font-size: 2.5rem;
    font-weight: 700;
    background: linear-gradient(to right, var(--primary), var(--secondary));
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 0.5rem;
}


.subtitle {
    font-size: 1.1rem;
    font-weight: 400;
    max-width: 600px;
    opacity: 0.85;
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.theme-toggle {
    position: absolute;
    top: 0;
    right: 0;
    background: var(--dark-card);
    border-radius: 50px;
    padding: 8px;
    display: flex;
    gap: 5px;
    box-shadow: var(--card-shadow);
    border: 1px solid var(--border);
}

body.light-mode .theme-toggle {
    background: var(--light-card);
}

.theme-btn {
    background: transparent;
    border: none;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--dark-text);
    transition: var(--transition);
}

body.light-mode .theme-btn {
    color: var(--light-text);
}

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

/* Main content grid */
.main-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}

@media (min-width: 768px) {
    .main-grid {
        grid-template-columns: 1fr 1fr;
    }
}

/* Card styles */
.card {
    background: rgba(30, 41, 59, 0.6);
    backdrop-filter: blur(12px);
    border-radius: 20px;
    padding: 2rem;
    box-shadow: var(--card-shadow);
    border: 1px solid var(--border);
    transition: var(--transition);
}

body.light-mode .card {
    background: rgba(255, 255, 255, 0.6);
    border: 1px solid rgba(203, 213, 225, 0.5);
}

.card-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--primary);
}

body.light-mode .card-title {
    color: var(--primary-dark);
}

/* Form styles */
.input-group {
    margin-bottom: 1.5rem;
}

.input-row {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.input-container {
    flex: 1;
    min-width: 200px;
}

label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    font-size: 0.9rem;
    opacity: 0.9;
}

input[type="datetime-local"] {
    width: 100%;
    padding: 0.9rem 1.2rem;
    border-radius: 12px;
    border: 1px solid var(--border);
    background: rgba(30, 41, 59, 0.5);
    color: var(--dark-text);
    font-size: 1rem;
    transition: var(--transition);
    outline: none;
}

body.light-mode input[type="datetime-local"] {
    background: rgba(241, 245, 249, 0.5);
    color: var(--light-text);
    border: 1px solid #cbd5e1;
}

input[type="datetime-local"]:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(0, 180, 216, 0.2);
}

.current-time-btn {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    border: none;
    border-radius: 12px;
    padding: 0.9rem 1.5rem;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    flex: 1;
    min-width: 200px;
    box-shadow: 0 4px 6px -1px rgba(0, 180, 216, 0.3), 0 2px 4px -2px rgba(0, 180, 216, 0.3);
}

.current-time-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 15px -3px rgba(0, 180, 216, 0.3), 0 4px 6px -4px rgba(0, 180, 216, 0.3);
}

/* Format grid */
.format-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 1rem;
    margin-top: 1rem;
}

.format-card {
    background: rgba(30, 41, 59, 0.4);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 1.2rem;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

body.light-mode .format-card {
    background: rgba(241, 245, 249, 0.4);
    border: 1px solid #e2e8f0;
}

.format-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.05);
    border-color: var(--primary);
}

.format-card.active {
    background: rgba(0, 180, 216, 0.1);
    border-color: var(--primary);
}

.format-name {
    font-weight: 600;
    font-size: 1rem;
    margin-bottom: 0.5rem;
    color: var(--primary);
}

.format-preview {
    font-size: 0.95rem;
    opacity: 0.9;
    margin-bottom: 0.5rem;
}

.format-tooltip {
    font-size: 0.85rem;
    opacity: 0.7;
    font-style: italic;
}

/* Preview section */
.preview-container {
    text-align: center;
    padding: 2rem;
    background: rgba(30, 41, 59, 0.3);
    border-radius: 16px;
    margin: 1.5rem 0;
    border: 1px dashed var(--border);
}

body.light-mode .preview-container {
    background: rgba(241, 245, 249, 0.3);
    border: 1px dashed #cbd5e1;
}

.preview-title {
    font-size: 1rem;
    margin-bottom: 1rem;
    opacity: 0.8;
}

.preview-text {
    font-size: 1.8rem;
    font-weight: 700;
    min-height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    text-shadow: 0 2px 4px rgba(0, 180, 216, 0.2);
}

.code-container {
    background: rgba(30, 41, 59, 0.4);
    border-radius: 16px;
    padding: 1.2rem;
    border: 1px solid var(--border);
    margin-top: 1.5rem;
    position: relative;

    /* make container a flexbox so button and input align nicely */
    display: flex;
    align-items: center;
}

body.light-mode .code-container {
    background: rgba(241, 245, 249, 0.4);
}

.code-label {
    font-size: 0.9rem;
    margin-bottom: 0.8rem;
    display: block;
    opacity: 0.8;
}

.discord-code {
    font-family: 'Courier New', Courier, monospace;
    font-size: 1.1rem;
    background: transparent;
    border: none;
    color: var(--dark-text);
    width: 100%;
    padding: 0.8rem;
    word-break: break-all;
    border-radius: 8px;
    background: rgba(15, 23, 42, 0.3);
}

body.light-mode .discord-code {
    color: var(--light-text);
    background: rgba(226, 232, 240, 0.3);
}

.copy-btn {
    position: absolute;
    top: 50%;
    right: 15px;
    transform: translateY(-50%);
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 10px;
    padding: 0.6rem 1.2rem;
    cursor: pointer;
    transition: var(--transition);
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 6px;
}

.copy-btn:hover {
    background: var(--primary-dark);
    transform: translateY(-50%) scale(1.05);
}

.copy-success {
    position: absolute;
    top: -35px;
    right: 0;
    background: var(--success);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    font-size: 0.85rem;
    opacity: 0;
    transition: var(--transition);
    font-weight: 500;
}

.copy-success.show {
    opacity: 1;
}

/* Info section */
.info-section {
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border);
}

.info-list {
    list-style: none;
    padding-left: 1.5rem;
}

.info-list li {
    margin-bottom: 0.8rem;
    position: relative;
    line-height: 1.6;
}

.info-list li:before {
    content: "•";
    color: var(--primary);
    position: absolute;
    left: -1.5rem;
    font-size: 1.2rem;
}

.note {
    background: rgba(245, 158, 11, 0.1);
    border-left: 3px solid var(--warning);
    padding: 1rem;
    border-radius: 0 8px 8px 0;
    margin-top: 1rem;
    font-size: 0.9rem;
}

/* Footer */
footer {
    text-align: center;
    margin-top: 3rem;
    padding-top: 2rem;
    font-size: 0.9rem;
    opacity: 0.7;
    border-top: 1px solid var(--border);
}

/* Responsive adjustments */
@media (max-width: 768px) {
    h1 {
        font-size: 2rem;
    }
    
    .subtitle {
        font-size: 1rem;
    }
    
    .card {
        padding: 1.5rem;
    }
    
    .preview-text {
        font-size: 1.4rem;
    }
    
    .theme-toggle {
        position: relative;
        margin-top: 1rem;
    }
}