/* ═══════════════════════════════════════════════════════════
   PicReminder v0.5 — Stylesheet
   Mobile-first, card-based, modern clean design
   ═══════════════════════════════════════════════════════════ */

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

:root {
    --color-primary:     #2563EB;
    --color-primary-dark:#1d4ed8;
    --color-primary-light:#dbeafe;
    --color-success:     #10B981;
    --color-success-dark:#059669;
    --color-success-light:#d1fae5;
    --color-warning:     #f59e0b;
    --color-warning-light:#fef3c7;
    --color-danger:      #ef4444;
    --color-danger-light:#fef2f2;
    --color-gray-50:     #f8fafc;
    --color-gray-100:    #f1f5f9;
    --color-gray-200:    #e2e8f0;
    --color-gray-300:    #cbd5e1;
    --color-gray-400:    #94a3b8;
    --color-gray-500:    #64748b;
    --color-gray-600:    #475569;
    --color-gray-700:    #334155;
    --color-gray-800:    #1e293b;
    --color-gray-900:    #0f172a;
    --color-white:       #ffffff;
    --radius-sm:         8px;
    --radius-md:         12px;
    --radius-lg:         16px;
    --radius-xl:         20px;
    --shadow-sm:         0 1px 3px rgba(0,0,0,0.06);
    --shadow-md:         0 4px 16px rgba(0,0,0,0.07);
    --shadow-lg:         0 8px 32px rgba(0,0,0,0.10);
    --transition:        0.2s ease;
}

html {
    -webkit-text-size-adjust: 100%;
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(160deg, #eff6ff 0%, #f1f5f9 40%, #f8fafc 100%);
    color: var(--color-gray-800);
    min-height: 100vh;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

/* ── Layout ──────────────────────────────────────────────── */
.container {
    max-width: 480px;
    margin: 0 auto;
    padding: 0 16px 32px;
}

/* ── Header / Nav ────────────────────────────────────────── */
.app-header {
    background: var(--color-white);
    border-bottom: 1px solid var(--color-gray-200);
    padding: 16px 0;
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(12px);
    background: rgba(255,255,255,0.92);
}

.app-header .container {
    padding-bottom: 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.app-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--color-gray-800);
}

.app-logo-icon {
    width: 36px;
    height: 36px;
    background: var(--color-primary);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 18px;
    flex-shrink: 0;
}

.app-logo-text {
    font-size: 20px;
    font-weight: 800;
    letter-spacing: -0.3px;
}

.app-logo-text span {
    color: var(--color-primary);
}

.nav-link {
    font-size: 14px;
    font-weight: 600;
    color: var(--color-primary);
    text-decoration: none;
    padding: 8px 14px;
    border-radius: var(--radius-sm);
    transition: background var(--transition);
}

.nav-link:hover {
    background: var(--color-primary-light);
}

/* ── Page Title ──────────────────────────────────────────── */
.page-title {
    margin: 24px 0 8px;
    font-size: 24px;
    font-weight: 800;
    color: var(--color-gray-900);
    letter-spacing: -0.3px;
}

.page-subtitle {
    color: var(--color-gray-500);
    font-size: 15px;
    margin-bottom: 24px;
    line-height: 1.5;
}

/* ── Cards ───────────────────────────────────────────────── */
.card {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    padding: 24px;
    margin-bottom: 16px;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--color-gray-100);
    transition: box-shadow var(--transition);
}

.card:hover {
    box-shadow: var(--shadow-lg);
}

.card-title {
    font-size: 15px;
    font-weight: 700;
    color: var(--color-gray-700);
    margin-bottom: 16px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-size: 12px;
}

/* ── Forms ───────────────────────────────────────────────── */
.form-group {
    margin-bottom: 18px;
}

.form-group:last-child {
    margin-bottom: 0;
}

.form-label {
    display: block;
    font-size: 14px;
    font-weight: 600;
    color: var(--color-gray-700);
    margin-bottom: 6px;
}

.form-label .required {
    color: var(--color-danger);
    margin-left: 2px;
}

.form-hint {
    font-size: 13px;
    color: var(--color-gray-400);
    margin-top: 4px;
    line-height: 1.4;
}

.form-input,
.form-textarea,
.form-select {
    width: 100%;
    padding: 13px 16px;
    border: 2px solid var(--color-gray-200);
    border-radius: var(--radius-md);
    font-size: 16px; /* Prevents iOS zoom */
    color: var(--color-gray-800);
    background: var(--color-gray-50);
    transition: border-color var(--transition), background var(--transition), box-shadow var(--transition);
    font-family: inherit;
    appearance: none;
    -webkit-appearance: none;
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
    outline: none;
    border-color: var(--color-primary);
    background: var(--color-white);
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.1);
}

.form-input::placeholder {
    color: var(--color-gray-400);
}

.form-textarea {
    resize: vertical;
    min-height: 80px;
}

/* ── File Upload ─────────────────────────────────────────── */
.file-upload {
    position: relative;
    border: 2px dashed var(--color-gray-300);
    border-radius: var(--radius-md);
    padding: 28px 20px;
    text-align: center;
    cursor: pointer;
    transition: border-color var(--transition), background var(--transition);
    background: var(--color-gray-50);
}

.file-upload:hover,
.file-upload.dragover {
    border-color: var(--color-primary);
    background: var(--color-primary-light);
}

.file-upload.has-file {
    border-color: var(--color-success);
    background: var(--color-success-light);
    border-style: solid;
}

.file-upload input[type="file"] {
    position: absolute;
    inset: 0;
    opacity: 0;
    cursor: pointer;
    width: 100%;
    height: 100%;
}

.file-upload-icon {
    font-size: 32px;
    margin-bottom: 8px;
    display: block;
}

.file-upload-text {
    font-size: 15px;
    color: var(--color-gray-600);
    font-weight: 500;
}

.file-upload-hint {
    font-size: 13px;
    color: var(--color-gray-400);
    margin-top: 4px;
}

.file-upload-preview {
    display: none;
    margin-top: 12px;
}

.file-upload-preview img {
    max-width: 100%;
    max-height: 200px;
    border-radius: var(--radius-sm);
    object-fit: cover;
}

.file-upload-preview .file-name {
    font-size: 13px;
    color: var(--color-success-dark);
    font-weight: 600;
    margin-top: 8px;
}

/* ── Buttons ─────────────────────────────────────────────── */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 24px;
    border: none;
    border-radius: var(--radius-md);
    font-size: 16px;
    font-weight: 700;
    cursor: pointer;
    transition: background var(--transition), transform 0.1s, box-shadow var(--transition);
    text-decoration: none;
    font-family: inherit;
    line-height: 1.3;
}

.btn:active {
    transform: scale(0.97);
}

.btn-block {
    display: flex;
    width: 100%;
}

.btn-primary {
    background: var(--color-primary);
    color: var(--color-white);
    box-shadow: 0 2px 8px rgba(37, 99, 235, 0.3);
}

.btn-primary:hover {
    background: var(--color-primary-dark);
    box-shadow: 0 4px 16px rgba(37, 99, 235, 0.35);
}

.btn-success {
    background: var(--color-success);
    color: var(--color-white);
    box-shadow: 0 2px 8px rgba(16, 185, 129, 0.3);
}

.btn-success:hover {
    background: var(--color-success-dark);
}

.btn-outline {
    background: transparent;
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
    padding: 12px 22px;
}

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

.btn-sm {
    padding: 9px 16px;
    font-size: 14px;
    border-radius: var(--radius-sm);
}

.btn-danger-outline {
    background: transparent;
    color: var(--color-danger);
    border: 2px solid var(--color-danger);
    padding: 12px 22px;
}

.btn-danger-outline:hover {
    background: var(--color-danger-light);
}

/* ── Alerts ──────────────────────────────────────────────── */
.alert {
    padding: 16px 18px;
    border-radius: var(--radius-md);
    margin-bottom: 20px;
    font-size: 14px;
    line-height: 1.5;
    font-weight: 500;
}

.alert-success {
    background: var(--color-success-light);
    color: #065f46;
    border: 1px solid #a7f3d0;
}

.alert-error {
    background: var(--color-danger-light);
    color: #991b1b;
    border: 1px solid #fca5a5;
}

.alert-info {
    background: var(--color-primary-light);
    color: #1e40af;
    border: 1px solid #93c5fd;
}

.alert a {
    color: inherit;
    font-weight: 700;
}

/* ── Reminder Cards ──────────────────────────────────────── */
.reminder-card {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    margin-bottom: 14px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-gray-100);
    transition: box-shadow var(--transition), transform var(--transition);
}

.reminder-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

.reminder-card-inner {
    display: flex;
    gap: 14px;
    padding: 14px;
}

.reminder-thumb {
    width: 72px;
    height: 72px;
    border-radius: var(--radius-sm);
    object-fit: cover;
    flex-shrink: 0;
    background: var(--color-gray-100);
}

.reminder-info {
    flex: 1;
    min-width: 0;
}

.reminder-title {
    font-size: 15px;
    font-weight: 700;
    color: var(--color-gray-800);
    margin-bottom: 4px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.reminder-meta {
    font-size: 13px;
    color: var(--color-gray-500);
    line-height: 1.5;
}

.reminder-meta strong {
    color: var(--color-gray-600);
    font-weight: 600;
}

.reminder-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 14px;
    background: var(--color-gray-50);
    border-top: 1px solid var(--color-gray-100);
}

/* ── Badges ──────────────────────────────────────────────── */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

.badge-active {
    background: var(--color-primary-light);
    color: var(--color-primary);
}

.badge-completed {
    background: var(--color-success-light);
    color: var(--color-success-dark);
}

.badge-sent {
    background: var(--color-warning-light);
    color: #92400e;
}

/* ── Empty State ─────────────────────────────────────────── */
.empty-state {
    text-align: center;
    padding: 48px 24px;
}

.empty-state-icon {
    font-size: 56px;
    margin-bottom: 16px;
    opacity: 0.7;
}

.empty-state h3 {
    font-size: 18px;
    color: var(--color-gray-700);
    margin-bottom: 8px;
}

.empty-state p {
    color: var(--color-gray-400);
    font-size: 14px;
    margin-bottom: 20px;
}

/* ── Email Lookup Form ───────────────────────────────────── */
.lookup-form {
    display: flex;
    gap: 10px;
    margin-bottom: 24px;
}

.lookup-form .form-input {
    flex: 1;
}

.lookup-form .btn {
    flex-shrink: 0;
}

/* ── Footer ──────────────────────────────────────────────── */
.app-footer {
    text-align: center;
    padding: 24px 16px 32px;
    color: var(--color-gray-400);
    font-size: 13px;
}

/* ── Animations ──────────────────────────────────────────── */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(12px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeInUp 0.35s ease-out;
}

/* Staggered card animation */
.reminder-card:nth-child(1) { animation-delay: 0ms; }
.reminder-card:nth-child(2) { animation-delay: 50ms; }
.reminder-card:nth-child(3) { animation-delay: 100ms; }
.reminder-card:nth-child(4) { animation-delay: 150ms; }
.reminder-card:nth-child(5) { animation-delay: 200ms; }

/* ── Loading spinner ─────────────────────────────────────── */
.btn.loading {
    pointer-events: none;
    opacity: 0.7;
}

.btn.loading::after {
    content: '';
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255,255,255,0.4);
    border-top-color: #fff;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
    margin-left: 8px;
}

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

/* ── Responsive ──────────────────────────────────────────── */
@media (min-width: 640px) {
    .container {
        max-width: 540px;
        padding: 0 24px 40px;
    }

    .card {
        padding: 28px;
    }

    .page-title {
        font-size: 28px;
    }
}

@media (min-width: 1024px) {
    .container {
        max-width: 560px;
    }
}