/* Modern Reset */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --primary: #0f172a;
    --primary-hover: #1e293b;
    --accent: #2563eb;
    --accent-hover: #1d4ed8;
    --bg-color: #f8fafc;
    --surface: #ffffff;
    --text-main: #0f172a;
    --text-muted: #64748b;
    --border: #e2e8f0;
    --error: #ef4444;
    --success: #10b981;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --radius-md: 8px;
    --radius-lg: 12px;
}

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    line-height: 1.5;
    padding: 2rem 1rem;
    -webkit-font-smoothing: antialiased;
}

.registration-container {
    max-width: 900px;
    margin: 0 auto;
    background-color: var(--surface);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}

/* Header */
.form-header {
    text-align: center;
    padding: 3rem 2rem 2rem;
    border-bottom: 1px solid var(--border);
}

.header-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background-color: #eff6ff;
    color: var(--accent);
    margin-bottom: 1rem;
}

.form-header h1 {
    font-size: 2rem;
    font-weight: 600;
    letter-spacing: -0.025em;
    margin-bottom: 0.5rem;
}

.form-header p {
    color: var(--text-muted);
    font-size: 1.05rem;
}

/* Sections */
.form-section {
    padding: 2.5rem 3rem;
    border-bottom: 1px solid var(--border);
}

.section-header {
    margin-bottom: 2rem;
}

.section-header h2 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.section-header p {
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* Forms & Inputs */
.form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.form-group.full-width {
    grid-column: 1 / -1;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-main);
}

input[type="text"],
input[type="tel"],
input[type="password"],
input[type="file"] {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    background-color: #fff;
    font-family: inherit;
    font-size: 0.95rem;
    color: var(--text-main);
    transition: all 0.2s ease;
    box-shadow: var(--shadow-sm);
}

input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

input[type="file"] {
    padding: 0.5rem;
    background-color: var(--bg-color);
    border: 1px dashed var(--border);
    cursor: pointer;
}

input[type="file"]::file-selector-button {
    padding: 0.5rem 1rem;
    border-radius: 4px;
    border: 1px solid var(--border);
    background-color: var(--surface);
    color: var(--text-main);
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    margin-right: 1rem;
    transition: background-color 0.2s;
}

input[type="file"]::file-selector-button:hover {
    background-color: var(--bg-color);
}

input.invalid {
    border-color: var(--error);
    background-color: #fef2f2;
}

.error-msg {
    color: var(--error);
    font-size: 0.8rem;
    min-height: 1.2rem;
    display: block;
}

/* Members Grid */
.members-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 1.5rem;
}

.member-card {
    background-color: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.member-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.member-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1.25rem;
    border-bottom: 1px solid var(--border);
    padding-bottom: 0.75rem;
}

.member-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background-color: var(--bg-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-muted);
}

.member-header h3 {
    font-size: 1rem;
    font-weight: 500;
}

.image-preview {
    margin-top: 0.75rem;
    width: 100%;
    height: auto;
    max-height: 150px;
    object-fit: contain;
    border-radius: 4px;
    background-color: #000;
    display: none;
}

/* Actions */
.form-actions {
    padding: 2rem 3rem;
    background-color: var(--bg-color);
    display: flex;
    justify-content: flex-end;
}

.submit-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    background-color: var(--primary);
    color: white;
    padding: 0.875rem 2rem;
    border: none;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: var(--shadow-sm);
}

.submit-btn:hover {
    background-color: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

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

.form-feedback {
    margin: 1.5rem 3rem 2rem;
    padding: 1rem;
    border-radius: var(--radius-md);
    font-weight: 500;
    text-align: center;
}

.form-feedback.success {
    background-color: #ecfdf5;
    color: #065f46;
    border: 1px solid #a7f3d0;
}

.form-feedback.error {
    background-color: #fef2f2;
    color: #991b1b;
    border: 1px solid #fecaca;
}

.hidden {
    display: none;
}

/* Responsive */
@media (max-width: 640px) {
    .form-grid {
        grid-template-columns: 1fr;
    }
    
    .form-section {
        padding: 1.5rem;
    }
    
    .form-actions {
        padding: 1.5rem;
    }
}