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

:root {
    --bg-primary: #0f0f13;
    --bg-secondary: #1a1a24;
    --bg-card: #22222e;
    --bg-input: #2a2a38;
    --border: #33334a;
    --text-primary: #e8e8ef;
    --text-secondary: #8888a0;
    --accent: #3262ff;
    --accent-hover: #70a3f0;
    --accent-glow: rgba(50, 98, 255, 0.25);
    --danger: #e74c3c;
    --danger-hover: #ff5e4f;
    --success: #2ecc71;
    --success-glow: rgba(46, 204, 113, 0.2);
    --warning: #f39c12;
    --radius: 12px;
    --radius-sm: 8px;
}

body {
    font-family: 'Inter', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
}

/* --- Login --- */
#login-screen {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: radial-gradient(ellipse at 50% 30%, rgba(50,98,255,0.08) 0%, transparent 60%);
}

.login-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 48px 40px;
    width: 100%;
    max-width: 400px;
    text-align: center;
    box-shadow: 0 20px 60px rgba(0,0,0,0.4);
}

.login-card h1 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 6px;
    background: linear-gradient(135deg, var(--accent), #5ba3f5);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.login-card p {
    color: var(--text-secondary);
    font-size: 14px;
    margin-bottom: 32px;
}

.login-card .icon {
    font-size: 48px;
    margin-bottom: 16px;
}

/* --- Inputs --- */
input, select, textarea {
    font-family: 'Inter', sans-serif;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    padding: 12px 16px;
    font-size: 14px;
    width: 100%;
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
}

input:focus, select:focus, textarea:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

textarea {
    resize: vertical;
    min-height: 120px;
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 13px;
    line-height: 1.5;
}

/* --- Buttons --- */
.btn {
    font-family: 'Inter', sans-serif;
    padding: 12px 24px;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.btn-primary {
    background: var(--accent);
    color: white;
}
.btn-primary:hover {
    background: var(--accent-hover);
    box-shadow: 0 4px 20px var(--accent-glow);
}

.btn-danger {
    background: transparent;
    color: var(--danger);
    border: 1px solid rgba(231, 76, 60, 0.3);
}
.btn-danger:hover {
    background: rgba(231, 76, 60, 0.1);
    border-color: var(--danger);
}

.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border);
}
.btn-outline:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.btn-success {
    background: var(--success);
    color: #fff;
}
.btn-success:hover {
    box-shadow: 0 4px 20px var(--success-glow);
}

.btn-sm {
    padding: 8px 14px;
    font-size: 12px;
}

.btn-block { width: 100%; justify-content: center; }

/* --- App Layout --- */
#app-screen { display: none; }

.app-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 32px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(12px);
}

.app-header h2 {
    font-size: 18px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent), #5ba3f5);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.tabs {
    display: flex;
    gap: 4px;
    background: var(--bg-input);
    border-radius: var(--radius-sm);
    padding: 4px;
}

.tab {
    padding: 8px 20px;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-family: 'Inter', sans-serif;
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    border-radius: 6px;
    transition: all 0.2s;
}

.tab.active {
    background: var(--accent);
    color: white;
}

.tab:hover:not(.active) {
    color: var(--text-primary);
}

.app-content {
    max-width: 900px;
    margin: 0 auto;
    padding: 32px;
}

.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
}

.section-header h3 {
    font-size: 16px;
    font-weight: 600;
}

.section-header span {
    color: var(--text-secondary);
    font-size: 13px;
}

/* --- Contact Cards --- */
.contact-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.contact-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.contact-card:hover {
    border-color: rgba(50, 98, 255, 0.3);
    box-shadow: 0 4px 20px rgba(0,0,0,0.2);
}

.contact-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 12px;
}

.contact-name {
    font-weight: 600;
    font-size: 15px;
}

.contact-meta {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 12px;
}

.meta-item {
    font-size: 12px;
    color: var(--text-secondary);
}

.meta-item strong {
    color: var(--text-primary);
}

.tags {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
}

.tag {
    font-size: 11px;
    padding: 3px 10px;
    border-radius: 20px;
    background: rgba(50, 98, 255, 0.15);
    color: #5ba3f5;
    font-weight: 500;
}

.tag.resume {
    background: rgba(46, 204, 113, 0.12);
    color: #2ecc71;
}

.contact-actions {
    display: flex;
    gap: 8px;
}

/* --- Modal --- */
.modal-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.6);
    backdrop-filter: blur(4px);
    z-index: 200;
    align-items: center;
    justify-content: center;
}

.modal-overlay.active {
    display: flex;
}

.modal {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 16px;
    width: 100%;
    max-width: 600px;
    max-height: 85vh;
    overflow-y: auto;
    padding: 32px;
    box-shadow: 0 24px 80px rgba(0,0,0,0.5);
}

.modal h3 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 24px;
}

.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    font-size: 12px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 6px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.form-actions {
    display: flex;
    gap: 12px;
    justify-content: flex-end;
    margin-top: 24px;
}

/* checkbox group */
.checkbox-group {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.checkbox-item {
    display: flex;
    align-items: center;
    gap: 6px;
    background: var(--bg-input);
    padding: 6px 12px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 12px;
    transition: background 0.15s;
}

.checkbox-item:hover {
    background: rgba(50, 98, 255, 0.15);
}

.checkbox-item input[type="checkbox"] {
    width: 14px;
    height: 14px;
    accent-color: var(--accent);
}

/* --- Settings --- */
.settings-panel {
    display: none;
}

.settings-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
}

.settings-card .hint {
    font-size: 12px;
    color: var(--text-secondary);
    margin-top: 8px;
}

/* --- Toast --- */
.toast {
    position: fixed;
    bottom: 24px;
    right: 24px;
    padding: 14px 24px;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 500;
    z-index: 300;
    opacity: 0;
    transform: translateY(12px);
    transition: all 0.3s;
    pointer-events: none;
}

.toast.show {
    opacity: 1;
    transform: translateY(0);
}

.toast.success {
    background: var(--success);
    color: white;
}

.toast.error {
    background: var(--danger);
    color: white;
}

/* --- Error label --- */
.error-msg {
    color: var(--danger);
    font-size: 13px;
    margin-top: 10px;
    min-height: 20px;
}

/* Switch */
.switch-row {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
}

.switch {
    position: relative;
    width: 44px;
    height: 24px;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    inset: 0;
    background: var(--bg-input);
    border-radius: 24px;
    cursor: pointer;
    transition: background 0.2s;
}

.slider::before {
    content: '';
    position: absolute;
    bottom: 3px;
    left: 3px;
    width: 18px;
    height: 18px;
    background: var(--text-secondary);
    border-radius: 50%;
    transition: all 0.2s;
}

.switch input:checked + .slider {
    background: var(--accent);
}

.switch input:checked + .slider::before {
    transform: translateX(20px);
    background: white;
}

@media (max-width: 600px) {
    .app-header { padding: 12px 16px; flex-wrap: wrap; gap: 12px; }
    .app-content { padding: 16px; }
    .form-row { grid-template-columns: 1fr; }
    .modal { margin: 16px; padding: 24px; }
}