:root {
    --bg-color: #0d1117;
    --text-main: #f0f6fc;
    --text-muted: #8b949e;
    --glass-bg: rgba(30, 41, 59, 0.3);
    --glass-border: rgba(255, 255, 255, 0.08);
    --primary: #38bdf8;
    --primary-hover: #0ea5e9;
    --accent: #818cf8;
    --card-bg: rgba(17, 24, 39, 0.7);
    --success: #34d399;
}

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

body {
    font-family: 'Outfit', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    overflow-x: hidden;
    position: relative;
}

/* Decorative Backgrounds */
.background-decor {
    position: fixed;
    top: -20vh;
    left: -10vw;
    width: 60vw;
    height: 60vw;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(56,189,248,0.15) 0%, rgba(13,17,23,0) 70%);
    z-index: -1;
    pointer-events: none;
}

.background-decor-2 {
    position: fixed;
    bottom: -20vh;
    right: -10vw;
    width: 50vw;
    height: 50vw;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(129,140,248,0.15) 0%, rgba(13,17,23,0) 70%);
    z-index: -1;
    pointer-events: none;
}

/* Header */
.main-header {
    margin-top: 4rem;
    text-align: center;
    animation: fadeInDown 0.8s ease-out;
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    margin-bottom: 0.5rem;
}

.logo-icon {
    font-size: 2.5rem;
}

h1 {
    font-size: 3rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -0.05em;
}

.subtitle {
    color: var(--text-muted);
    font-size: 1.1rem;
    font-weight: 300;
}

/* Main Container */
.container {
    width: 100%;
    max-width: 1000px;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

/* Glass Panel Form */
.glass-panel {
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    padding: 2rem;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    align-items: flex-start;
    animation: fadeInUp 0.8s ease-out 0.2s both;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

label {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Radio Buttons Styling */
.radio-group {
    display: flex;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 12px;
    padding: 0.25rem;
    border: 1px solid var(--glass-border);
}

.radio-group input[type="radio"] {
    display: none;
}

.radio-label {
    flex: 1;
    text-align: center;
    padding: 0.75rem 1rem;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.3s ease;
    color: var(--text-muted);
}

.radio-group input[type="radio"]:checked + .radio-label {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-main);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

/* Number Input */
.num-input {
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    padding: 0.75rem 1rem;
    color: var(--text-main);
    font-family: inherit;
    font-size: 1rem;
    outline: none;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.num-input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(56, 189, 248, 0.2);
}

.helper-text {
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* Primary Button */
.primary-btn {
    grid-column: 1 / -1;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: white;
    border: none;
    border-radius: 12px;
    padding: 1rem;
    font-size: 1.1rem;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 10px 20px -10px rgba(56, 189, 248, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
    margin-top: 0.5rem;
}

.primary-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 15px 25px -10px rgba(56, 189, 248, 0.6);
}

.primary-btn:active {
    transform: translateY(0);
}

.primary-btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
}

/* Custom Loader */
.btn-loader {
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255,255,255,0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 1s ease-in-out infinite;
}

/* Results Section */
.results-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

/* Result Card */
.result-card {
    background: var(--card-bg);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 1.5rem;
    position: relative;
    overflow: hidden;
    transition: all 0.3s ease;
    animation: fadeInUp 0.5s ease-out both;
}

.result-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px -10px rgba(0, 0, 0, 0.5);
    border-color: rgba(255, 255, 255, 0.2);
}

.result-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    opacity: 0;
    transition: opacity 0.3s ease;
}

.result-card:hover::before {
    opacity: 1;
}

.price-tag {
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--success);
}

.journey-leg {
    margin-bottom: 1rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid rgba(255,255,255,0.05);
}

.journey-leg:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.leg-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    color: var(--text-muted);
    letter-spacing: 0.1em;
    margin-bottom: 0.25rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.leg-date {
    font-size: 1.1rem;
    font-weight: 500;
}

.leg-price {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-top: 0.25rem;
}

.trip-duration {
    display: inline-block;
    margin-top: 1rem;
    padding: 0.25rem 0.75rem;
    background: rgba(255,255,255,0.05);
    border-radius: 20px;
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* States */
.hidden {
    display: none !important;
}

.empty-state {
    text-align: center;
    padding: 4rem 2rem;
    background: var(--glass-bg);
    border: 1px dashed var(--glass-border);
    border-radius: 24px;
    color: var(--text-muted);
    animation: fadeIn 0.5s ease-out;
}

.empty-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    opacity: 0.5;
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

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

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

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

/* Responsive */
@media (max-width: 600px) {
    .glass-panel {
        grid-template-columns: 1fr;
    }
    h1 { font-size: 2.2rem; }
}