:root {
    --primary-color: #00ffd5;
    --primary-darker: #00d2aa;
    --bg-color: #121212;
    --card-bg: #1e1e24;
    --input-bg: #2a2a35;
    --text-main: #ffffff;
    --text-muted: #a0a0a0;
    --border-color: #444444;
}

body {
    font-family: 'Segoe UI', Roboto, sans-serif;
    background-color: var(--bg-color);
    background-image: linear-gradient(to bottom right, #0a0a0a, #1a1a1a);
    color: var(--text-main);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
}

.card {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 20px;
    box-shadow: 0 10px 40px rgba(0, 255, 213, 0.15);
    width: 320px;
    text-align: center;
    border: 1px solid #333;
}

h1 {
    margin: 0 0 1rem 0;
    font-size: 1.5rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

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

.subtitle {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 1.5rem;
}

/* --- TABS STYLING --- */
.tabs {
    display: flex;
    background: var(--input-bg);
    border-radius: 10px;
    padding: 5px;
    margin-bottom: 20px;
}

.tab-btn {
    flex: 1;
    background: transparent;
    color: var(--text-muted);
    padding: 10px;
    font-size: 0.9rem;
    border: none;
    cursor: pointer;
    box-shadow: none;
    margin: 0;
}

.tab-btn.active {
    background: var(--card-bg);
    color: var(--primary-color);
    border-radius: 8px;
    font-weight: bold;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

/* Hide inactive tabs */
.tab-content {
    display: none;
    animation: fadeIn 0.3s ease;
}

.tab-content.active {
    display: block;
}

/* --- INPUTS --- */
.input-group {
    margin-bottom: 1.5rem;
    text-align: left;
}

label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-muted);
    font-size: 0.8rem;
    font-weight: bold;
    text-transform: uppercase;
}

.time-inputs {
    display: flex;
    align-items: center;
    gap: 8px;
}

input {
    width: 100%;
    padding: 12px;
    background-color: var(--input-bg);
    border: 2px solid var(--border-color);
    color: var(--text-main);
    border-radius: 10px;
    font-size: 1.1rem;
    box-sizing: border-box;
    font-family: monospace;
}

input:focus {
    border-color: var(--primary-color);
    outline: none;
}

input[type="time"]::-webkit-calendar-picker-indicator {
    filter: invert(1);
    cursor: pointer;
}

.colon {
    font-weight: bold;
    font-size: 1.5rem;
    color: var(--text-muted);
}

/* --- BUTTONS --- */
button {
    width: 100%;
    padding: 14px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-darker));
    color: #000;
    border: none;
    border-radius: 10px;
    font-size: 1rem;
    font-weight: 800;
    cursor: pointer;
    margin-top: 5px;
    transition: transform 0.2s;
}

button:hover {
    transform: translateY(-2px);
}

/* Secondary Button (Use for Alarm) */
.secondary-btn {
    background: transparent;
    border: 1px solid var(--primary-color);
    color: var(--primary-color);
    margin-top: 15px;
    font-size: 0.9rem;
    padding: 8px;
}

.secondary-btn:hover {
    background: rgba(0, 255, 213, 0.1);
}

/* --- RESULTS --- */
.result-box {
    margin-top: 25px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}

.hidden {
    display: none;
}

.result-label {
    color: var(--text-muted);
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 5px;
}

h2 {
    font-size: 2.5rem;
    margin: 0;
    color: var(--primary-color);
    font-family: monospace;
    text-shadow: 0 0 15px rgba(0, 255, 213, 0.4);
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(5px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}