:root {
    /* Modern Apple Typography */
    --font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;

    /* Apple Color Palette */
    --primary-color: #1d1d1f;
    --text-primary: #1d1d1f;
    --text-secondary: #86868b;
    --accent-color: #34c759;
    /* iOS Green */
    --apple-blue: #007aff;
    /* iOS Blue */
    --error-color: #ff3b30;
    /* iOS Red */

    /* Glass Tokens */
    --glass-bg: rgba(255, 255, 255, 0.35);
    --glass-bg-hover: rgba(255, 255, 255, 0.5);
    --glass-border: rgba(255, 255, 255, 0.5);
    --glass-border-light: rgba(255, 255, 255, 0.8);
    --glass-blur: blur(24px);
    --glass-shadow: 0 12px 40px rgba(0, 0, 0, 0.08);
    --glass-inner-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.6);

    /* Solid Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
}

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

body {
    font-family: var(--font-family);
    background-color: var(--background-color);
    background: radial-gradient(
      ellipse at center,
      #ffffff 0%,
      #fbfdff 35%,
      #f1f7ff 65%,
      #d9ebff 100%
    );
    color: var(--text-primary);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    min-height: 100vh;
}

h1,
h2,
h3,
h4 {
    font-weight: 600;
    color: var(--primary-color);
    letter-spacing: -0.02em;
    margin-bottom: 0.75rem;
}

a {
    color: var(--apple-blue);
    text-decoration: none;
    transition: all 0.2s ease;
}

a:hover {
    opacity: 0.8;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

/* Base Glass Class */
.glass-panel {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow), var(--glass-inner-shadow);
    border-radius: 20px;
}

/* Buttons */
.btn-primary {
    background: rgba(0, 98, 255, 0.7);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    color: #ffffff;
    padding: 0.8rem 1.5rem;
    border-radius: 14px;
    font-weight: 600;
    border: 1px solid var(--glass-border-light);
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    width: 100%;
    font-size: 1rem;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05), inset 0 1px 0 rgba(255, 255, 255, 1);
}

.btn-primary:hover {
    background: rgba(255, 255, 255, 0.9);
    transform: scale(1.02);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1), inset 0 1px 0 rgba(255, 255, 255, 1);
}

.btn-primary:active {
    transform: scale(0.98);
}

.btn-primary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.btn-outline {
    background: transparent;
    color: var(--primary-color);
    padding: 0.6rem 1.2rem;
    border-radius: 12px;
    font-weight: 600;
    border: 1px solid var(--primary-color);
    cursor: pointer;
    transition: all 0.2s ease;
    text-align: center;
    display: inline-block;
}

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

/* Registration Form Card */
.registration-container {
    max-width: 550px;
    margin: 3rem auto 5rem;
}

.card {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-radius: 24px;
    padding: 2.5rem;
    box-shadow: var(--glass-shadow), var(--glass-inner-shadow);
    border: 1px solid var(--glass-border);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-label {
    display: block;
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.form-control {
    width: 100%;
    padding: 0.85rem 1rem;
    border: 1px solid #ced4da;
    border-radius: 14px;
    font-size: 1rem;
    font-family: inherit;
    color: var(--text-primary);
    background: #ffffff;
    transition: all 0.3s ease;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.02);
}

.form-control::placeholder {
    color: #a1a1a6;
}

.form-control:focus {
    outline: none;
    background: rgba(255, 255, 255, 0.8);
    border-color: var(--apple-blue);
    box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.2), inset 0 2px 4px rgba(0, 0, 0, 0.02);
}

.error-message {
    color: var(--error-color);
    font-size: 0.85rem;
    margin-top: 0.25rem;
    display: none;
}

.alert {
    padding: 1rem 1.5rem;
    border-radius: 16px;
    margin-bottom: 1.5rem;
    display: none;
    font-weight: 500;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.alert-error {
    background-color: rgba(255, 59, 48, 0.15);
    color: #c92a2a;
    border-color: rgba(255, 59, 48, 0.2);
}

.alert-success {
    background-color: rgba(52, 199, 89, 0.15);
    color: #2b8a3e;
    border-color: rgba(52, 199, 89, 0.2);
}

/* Success Page */
.success-container {
    text-align: center;
    max-width: 600px;
    margin: 5rem auto;
}

.success-icon {
    font-size: 4rem;
    color: var(--accent-color);
    margin-bottom: 1rem;
}

.qr-container {
    background: rgba(255, 255, 255, 0.5);
    backdrop-filter: var(--glass-blur);
    padding: 2.5rem 2rem;
    border-radius: 24px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
    box-shadow: var(--glass-shadow), var(--glass-inner-shadow);
    border: 1px solid var(--glass-border);
    margin: 2rem auto;
    max-width: 400px;
}

.qr-container h3 {
    margin: 0;
    color: var(--text-secondary);
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    font-weight: 600;
}

.qr-container img {
    width: 220px;
    height: 220px;
    border-radius: 16px;
    padding: 10px;
    background: white;
    border: 1px solid rgba(0, 0, 0, 0.05);
    box-shadow: var(--shadow-sm);
}

.registration-no {
    font-size: 2.5rem;
    font-weight: 700;
    letter-spacing: 2px;
    color: var(--primary-color);
    margin: 0;
    padding: 1rem 2rem;
    background: rgba(255, 255, 255, 0.6);
    border-radius: 16px;
    display: inline-block;
    width: 100%;
    text-align: center;
    border: 1px solid var(--glass-border);
}

/* Badges */
.badge {
    padding: 0.35rem 0.75rem;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 600;
    display: inline-block;
    backdrop-filter: blur(8px);
}

.badge-success {
    background: rgba(52, 199, 89, 0.2);
    color: #1e6b30;
    border: 1px solid rgba(52, 199, 89, 0.3);
}

.badge-pending {
    background: rgba(255, 149, 0, 0.2);
    color: #b36a00;
    border: 1px solid rgba(255, 149, 0, 0.3);
}

.badge-failed {
    background: rgba(255, 59, 48, 0.2);
    color: #c92a2a;
    border: 1px solid rgba(255, 59, 48, 0.3);
}

/* Data Tables */
.data-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
}

.data-table th,
.data-table td {
    padding: 1.25rem 1rem;
    text-align: left;
    border-bottom: 1px solid rgba(255, 255, 255, 0.4);
}

.data-table th {
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.data-table tr {
    transition: background 0.2s ease;
}

.data-table tbody tr:hover {
    background: rgba(255, 255, 255, 0.3);
}

/* Responsive */
@media (max-width: 768px) {
    body {
        /* background-image: url('../images/Background.jpg');
        background-size: cover;
        background-position: top center; */
    }

    .card {
        padding: 1.5rem;
        border-radius: 20px;
    }

    .registration-container {
        margin: 2rem auto 2rem;
        padding: 0 1rem;
    }
}