:root {
    --primary: #E63946;
    --primary-dark: #C1121F;
    --primary-light: #FDE8E9;
    --text-main: #1D3557;
    --text-muted: #457B9D;
    --bg-page: #F4F6F8;
    --bg-card: #FFFFFF;
    --border-color: #E9ECEF;
    --sidebar-width: 260px;
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.05);
    --shadow-md: 0 8px 24px rgba(230, 57, 70, 0.08);
    --shadow-hover: 0 12px 32px rgba(230, 57, 70, 0.15);
    --radius-lg: 16px;
    --radius-md: 12px;
    --transition: all 0.3s ease;
}

* { margin: 0; padding: 0; box-sizing: border-box; font-family: 'Inter', sans-serif; }

body { background-color: var(--bg-page); color: var(--text-main); line-height: 1.6; }

/* ====================== LAYOUT ====================== */
.app-layout { display: flex; min-height: 100vh; }

/* ====================== SIDEBAR ====================== */
.sidebar {
    width: var(--sidebar-width);
    background: var(--bg-card);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    left: 0;
    top: 0;
    z-index: 100;
}

.logo {
    padding: 28px 24px;
    display: flex;
    align-items: center;
    gap: 12px;
    border-bottom: 1px solid var(--border-color);
}

.logo-icon { font-size: 2rem; }

.logo h1 {
    font-size: 1.3rem;
    font-weight: 800;
    letter-spacing: -0.5px;
    line-height: 1;
}

.highlight { color: var(--primary); }

.nav-menu {
    padding: 24px 12px;
    display: flex;
    flex-direction: column;
    gap: 6px;
    flex: 1;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    text-decoration: none;
    color: var(--text-muted);
    font-weight: 600;
    font-size: 0.95rem;
    border-radius: 10px;
    transition: var(--transition);
}

.nav-link:hover { background-color: var(--bg-page); color: var(--text-main); }
.nav-link.active { background-color: var(--primary-light); color: var(--primary-dark); }
.nav-link .icon { font-size: 1.1rem; width: 24px; text-align: center; }

.user-profile {
    padding: 20px 24px;
    border-top: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 12px;
}

.avatar {
    width: 40px;
    height: 40px;
    background: var(--primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 1rem;
    flex-shrink: 0;
}

.user-info { display: flex; flex-direction: column; }
.user-info .name { font-weight: 700; font-size: 0.9rem; }
.user-info .role { font-size: 0.75rem; color: var(--text-muted); }

/* ====================== MAIN CONTENT ====================== */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    padding: 40px 50px;
}

/* ====================== PAGE SWITCHING ====================== */
.page { display: none; animation: fadeIn 0.3s ease; }
.page.active { display: block; }

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ====================== PAGE HEADER ====================== */
.page-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    margin-bottom: 30px;
}

.page-header h2 { font-size: 2rem; letter-spacing: -0.5px; }
.subtitle { color: var(--text-muted); font-size: 1rem; }

/* ====================== CONTENT GRID ====================== */
.content-grid {
    display: grid;
    grid-template-columns: 380px 1fr;
    gap: 40px;
    align-items: start;
}

/* ====================== CARDS ====================== */
.card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 30px;
    box-shadow: var(--shadow-sm);
    border: 1px solid rgba(0,0,0,0.03);
}

.form-card h3 { font-size: 1.2rem; margin-bottom: 4px; }
.form-desc { color: var(--text-muted); font-size: 0.85rem; margin-bottom: 20px; }

/* ====================== FORM ====================== */
.form-group { margin-bottom: 18px; }

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
}

.form-group label {
    display: block;
    font-size: 0.82rem;
    font-weight: 600;
    margin-bottom: 6px;
    color: var(--text-main);
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 0.95rem;
    transition: var(--transition);
    background-color: var(--bg-page);
    color: var(--text-main);
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-light);
    background-color: var(--bg-card);
}

.submit-btn {
    width: 100%;
    background: var(--primary);
    color: white;
    border: none;
    padding: 13px;
    border-radius: var(--radius-md);
    font-size: 0.95rem;
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition);
    margin-top: 6px;
}

.submit-btn:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

/* ====================== FEED / CARDS ====================== */
.requests-feed { display: flex; flex-direction: column; gap: 16px; }

.request-card {
    background: var(--bg-card);
    border-radius: var(--radius-md);
    padding: 22px 24px;
    box-shadow: var(--shadow-sm);
    border-left: 5px solid var(--primary);
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    transition: var(--transition);
    animation: slideIn 0.4s ease-out forwards;
}

.request-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateX(4px);
}

@keyframes slideIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

.req-info { flex: 1; }
.req-info h3 { font-size: 1.15rem; margin-bottom: 6px; }

.city-badge {
    display: inline-block;
    background: var(--bg-page);
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--text-muted);
    margin-bottom: 10px;
}

.req-details {
    color: var(--text-muted);
    font-size: 0.88rem;
    display: flex;
    flex-direction: column;
    gap: 5px;
    margin-bottom: 10px;
}

.contact-btn {
    display: inline-block;
    padding: 7px 14px;
    background: var(--bg-page);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    border-radius: 6px;
    font-size: 0.82rem;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
}

.contact-btn:hover {
    background: var(--primary-light);
    color: var(--primary-dark);
    border-color: var(--primary-light);
}

.blood-badge {
    background: var(--primary);
    color: white;
    width: 58px;
    height: 58px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    font-weight: 800;
    box-shadow: 0 4px 12px rgba(230, 57, 70, 0.3);
    flex-shrink: 0;
    margin-left: 20px;
}

.empty-msg {
    text-align: center;
    color: var(--text-muted);
    padding: 40px 20px;
    font-size: 0.95rem;
    background: var(--bg-card);
    border-radius: var(--radius-md);
}

/* ====================== BADGES ====================== */
.live-badge {
    background: var(--primary-light);
    color: var(--primary-dark);
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 7px;
    height: fit-content;
}

.dot {
    width: 8px;
    height: 8px;
    background: var(--primary);
    border-radius: 50%;
    animation: pulse 1.5s infinite;
}

@keyframes pulse {
    0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(230, 57, 70, 0.7); }
    70% { transform: scale(1); box-shadow: 0 0 0 6px rgba(230, 57, 70, 0); }
    100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(230, 57, 70, 0); }
}

/* ====================== EMPTY STATE ====================== */
.empty-state {
    text-align: center;
    color: var(--text-muted);
    padding: 60px 20px;
    background: var(--bg-card);
    border-radius: var(--radius-md);
    border: 2px dashed var(--border-color);
}

.empty-icon {
    font-size: 3rem;
    margin-bottom: 12px;
}

.empty-state p {
    font-size: 0.95rem;
    line-height: 1.8;
}

/* ====================== BANK ICON ====================== */
.blood-badge.bank-icon {
    background: var(--text-main);
    font-size: 1.6rem;
}

/* ====================== MOBILE TOPBAR ====================== */
.mobile-topbar {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 60px;
    background: var(--bg-card);
    border-bottom: 1px solid var(--border-color);
    align-items: center;
    padding: 0 20px;
    gap: 16px;
    z-index: 200;
    box-shadow: var(--shadow-sm);
}

.mobile-logo {
    font-size: 1.1rem;
    font-weight: 800;
    letter-spacing: -0.3px;
}

/* ====================== HAMBURGER BUTTON ====================== */
.hamburger {
    background: none;
    border: none;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    padding: 6px;
    border-radius: 8px;
    transition: var(--transition);
}

.hamburger:hover { background: var(--bg-page); }

.hamburger span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--text-main);
    border-radius: 4px;
    transition: var(--transition);
}

/* Animate hamburger → X when open */
.hamburger.open span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}
.hamburger.open span:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
}
.hamburger.open span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ====================== OVERLAY ====================== */
.overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.4);
    z-index: 150;
    backdrop-filter: blur(2px);
    animation: fadeIn 0.2s ease;
}

.overlay.visible { display: block; }

/* ====================== RESPONSIVE ====================== */
@media (max-width: 960px) {
    .mobile-topbar { display: flex; }

    .app-layout { flex-direction: column; }

    /* Sidebar becomes a hidden slide-in drawer */
    .sidebar {
        position: fixed;
        top: 0;
        left: 0;
        height: 100vh;
        width: 260px;
        transform: translateX(-100%);
        transition: transform 0.3s ease;
        z-index: 180;
        box-shadow: 4px 0 24px rgba(0,0,0,0.15);
    }

    .sidebar.open { transform: translateX(0); }

    /* Main content fills full width, with top offset for mobile bar */
    .main-content {
        margin-left: 0;
        padding: 80px 20px 30px;
    }

    .content-grid { grid-template-columns: 1fr; }

    .page-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }

    .page-header h2 { font-size: 1.5rem; }
}