/* --- Enhanced Professional UI Styles --- */
:root {
    --primary: #c0392b;
    --primary-light: #e74c3c;
    --background: rgb(0, 0, 0);
    --background-accent: #ffeaea;
    --card-bg: #fff;
    --shadow: 0 8px 32px #e74c3c22;
    --border-radius: 18px;
    --transition: background 0.2s, color 0.2s, box-shadow 0.2s;
}

body {
    font-family: 'Poppins', Arial, sans-serif;
    background: linear-gradient(135deg, var(--background) 60%, var(--background-accent) 100%);
    margin: 0;
    padding: 0;
    min-height: 100vh;
    color: #222;
}

nav {
    width: 100%;
    background: var(--background-accent);
    padding: 16px 0 12px 0;
    box-shadow: 0 2px 8px #e74c3c11;
    margin-bottom: 18px;
}
nav a {
    color: var(--primary);
    font-weight: 700;
    font-size: 1.13em;
    text-decoration: none;
    padding: 10px 26px;
    border-radius: 8px;
    transition: var(--transition);
}
nav a:hover {
    background: var(--primary);
    color: #fff;
}

.container, .register-form-card, .login-container, .home-container, .team-section, .table-card, .chat-placeholder {
    background: var(--card-bg);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    padding: 40px 32px 28px 32px;
    max-width: 600px;
    margin: 40px auto 24px auto;
}

h1, h2, .dashboard-header, .team-title {
    color: var(--primary);
    font-weight: 800;
    letter-spacing: 0.5px;
}

h1 { font-size: 2.3em; margin-bottom: 10px; }
h2, .dashboard-header { font-size: 2em; margin-bottom: 18px; }
.team-title { font-size: 1.5em; margin-bottom: 18px; }

.button, button, .tab-btn, .donor-form-btn, .logout-btn {
    background: var(--primary);
    color: #fff;
    border: none;
    border-radius: 8px;
    padding: 14px 0;
    font-size: 1.1em;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    display: inline-block;
    box-shadow: 0 2px 8px #e74c3c11;
}
.button:hover, button:hover, .tab-btn:hover, .donor-form-btn:hover, .logout-btn:hover {
    background: var(--primary-light);
    color: #fff;
}

input, select, textarea {
    padding: 12px;
    border-radius: 6px;
    border: 1.5px solid #f3d1d1;
    font-size: 1em;
    margin-bottom: 12px;
    width: 100%;
    box-sizing: border-box;
    background: #fafafa;
    transition: border 0.2s;
}
input:focus, select:focus, textarea:focus {
    border: 1.5px solid var(--primary-light);
    outline: none;
}

/* Disabled form styles */
.form-disabled input:disabled,
.form-disabled select:disabled,
.form-disabled textarea:disabled {
    background-color: #f5f5f5;
    color: #999;
    cursor: not-allowed;
    opacity: 0.6;
}

.form-disabled button:disabled {
    background-color: #ccc;
    color: #666;
    cursor: not-allowed;
    opacity: 0.6;
}

.form-disabled button:disabled:hover {
    background-color: #ccc;
    color: #666;
}

label {
    color: var(--primary);
    font-weight: 600;
    margin-bottom: 4px;
}

.table-card {
    background: var(--card-bg);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    padding: 24px 18px;
    max-width: 1100px;
    margin: 24px auto;
}
.table-title {
    color: var(--primary);
    font-size: 1.15em;
    font-weight: 700;
    margin-bottom: 10px;
    text-align: left;
    letter-spacing: 0.5px;
}
table {
    width: 100%;
    border-collapse: collapse;
    background: transparent;
}
th, td {
    padding: 14px 10px;
    border-bottom: 1px solid #f3d1d1;
    text-align: left;
    font-size: 1.05em;
}
th {
    background: var(--background-accent);
    color: var(--primary);
    font-size: 1.08em;
    font-weight: 700;
}
tr:last-child td { border-bottom: none; }
tr:nth-child(even) { background: #faf6f6; }
tr:hover { background: #fff2f2; }

.tab-btn {
    padding: 10px 22px;
    border: none;
    background: var(--background-accent);
    color: var(--primary);
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    margin-bottom: 4px;
}
.tab-btn.active-tab, .tab-btn:active {
    background: var(--primary);
    color: #fff;
}

.logout-btn {
    background: var(--primary);
    color: #fff;
    border: none;
    border-radius: 8px;
    padding: 12px 32px;
    font-size: 1.12em;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
    margin: 0 auto;
    display: inline-block;
}
.logout-btn:hover { background: var(--primary-light); color: #fff; }

.welcome-user {
    background: var(--background-accent);
    color: var(--primary);
    font-weight: 700;
    font-size: 1.13em;
    border-radius: 8px;
    padding: 8px 22px;
    margin-left: 18px;
    box-shadow: 0 2px 8px #e74c3c11;
    letter-spacing: 0.5px;
}

.form-row {
    display: flex;
    gap: 16px;
}
.form-group {
    flex: 1 1 0;
    display: flex;
    flex-direction: column;
}
.section-header {
    color: var(--primary);
    font-size: 1.1em;
    font-weight: 700;
    text-align: center;
    margin-bottom: 18px;
}

.error-message {
    color: #fff;
    background: var(--primary-light);
    padding: 10px 0;
    border-radius: 8px;
    margin-bottom: 10px;
    font-weight: 600;
    text-align: center;
}

a {
    color: var(--primary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s;
}
a:hover {
    text-decoration: underline;
    color: var(--primary-light);
}

@media (max-width: 900px) {
    .table-card { padding: 10px 2vw; }
    th, td { padding: 8px 4px; font-size: 0.98em; }
}
@media (max-width: 700px) {
    .container, .register-form-card, .login-container, .home-container, .team-section, .table-card, .chat-placeholder {
        padding: 16px 4vw;
        margin: 20px 2vw;
    }
    .form-row { flex-direction: column; gap: 0; }
}

/* --- Desktop Layout Enhancements --- */
@media (min-width: 1100px) {
    .container {
        max-width: 1200px;
        margin: 40px auto 24px auto;
        padding: 40px 48px 28px 48px;
    }
    .dashboard-header {
        font-size: 2.4em;
    }
    .table-card {
        padding: 32px 28px;
    }
    .form-row {
        gap: 32px;
    }
}

.dashboard-main {
    padding: 32px 0;
    background: var(--background);
    min-height: 80vh;
}

.table-container {
    overflow-x: auto;
    width: 100%;
}
table {
    min-width: 900px;
    max-width: 100%;
}
@media (max-width: 1100px) {
    table { min-width: 600px; }
}

/* Visually separate tab content for desktop */
[id^="tab-"] {
    margin-bottom: 32px;
    background: #fff;
    border-radius: 14px;
    box-shadow: 0 2px 12px #e74c3c11;
    padding: 18px 12px;
}

/* --- Page Transition Loader --- */
#page-loader {
    position: fixed;
    inset: 0;
    z-index: 99999;
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(8px);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s;
}

#page-loader.active {
    opacity: 1;
    visibility: visible;
}

.loader-heart {
    font-size: 3rem;
    color: var(--primary);
    animation: heartBeat 1.2s ease-in-out infinite;
    filter: drop-shadow(0 0 10px rgba(192, 57, 43, 0.3));
}

.loader-text {
    margin-top: 15px;
    font-family: 'Sora', sans-serif;
    font-weight: 700;
    color: var(--primary);
    letter-spacing: 1px;
    font-size: 1.1rem;
}

@keyframes heartBeat {
    0%, 100% { transform: scale(1); }
    15% { transform: scale(1.2); }
    30% { transform: scale(1.1); }
    45% { transform: scale(1.3); }
}

/* Top Progress Bar */
#top-progress-bar {
    position: fixed;
    top: 0;
    left: 0;
    height: 3px;
    background: var(--primary);
    z-index: 100000;
    width: 0;
    transition: width 0.4s ease;
    box-shadow: 0 0 10px rgba(192, 57, 43, 0.5);
}