:root {
    --primary: #4F46E5;
    --primary-hover: #4338CA;
    --bg-color: #F3F4F6;
    --card-bg: #FFFFFF;
    --text-color: #1F2937;
    --text-muted: #6B7280;
    --border-color: #E5E7EB;
    --radius: 12px;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.container {
    max-width: 850px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Navbar */
.navbar {
    background-color: var(--card-bg);
    border-bottom: 1px solid var(--border-color);
    padding: 15px 0;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 15px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 1.4rem;
    font-weight: bold;
    color: var(--primary);
    text-decoration: none;
}

.nav-links {
    display: flex;
    gap: 15px;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-muted);
    font-size: 0.95rem;
    transition: color 0.2s;
}

.nav-links a:hover, .nav-links a.active {
    color: var(--primary);
    font-weight: bold;
}

/* Main Content */
.main-content {
    margin-top: 30px;
    margin-bottom: 40px;
    flex: 1;
}

.hero-card, .inbox-card {
    background-color: var(--card-bg);
    border-radius: var(--radius);
    padding: 25px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
    margin-bottom: 20px;
}

.hero-card h1 {
    font-size: 1.5rem;
    margin-bottom: 8px;
    text-align: center;
}

.hero-card p {
    color: var(--text-muted);
    text-align: center;
    margin-bottom: 20px;
    font-size: 0.95rem;
}

/* Email Input Group */
.email-box-wrapper {
    max-width: 600px;
    margin: 0 auto 15px;
}

.email-input-group {
    display: flex;
    gap: 8px;
    background-color: #F9FAFB;
    padding: 6px;
    border: 2px solid var(--border-color);
    border-radius: var(--radius);
}

.email-input-group input {
    flex: 1;
    border: none;
    background: transparent;
    padding: 10px;
    font-size: 1.05rem;
    direction: ltr;
    text-align: center;
    font-weight: bold;
    color: var(--text-color);
    outline: none;
}

.email-input-group button {
    background-color: var(--primary);
    color: white;
    border: none;
    padding: 10px 16px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 6px;
    transition: background 0.2s;
}

.email-input-group button:hover {
    background-color: var(--primary-hover);
}

/* Controls */
.controls-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 600px;
    margin: 0 auto;
    font-size: 0.88rem;
    color: var(--text-muted);
}

.btn-secondary {
    background-color: #EEF2FF;
    color: var(--primary);
    border: none;
    padding: 8px 14px;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 600;
}

.btn-secondary:hover {
    background-color: #E0E7FF;
}

/* Inbox Table */
.inbox-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 12px;
    margin-bottom: 15px;
}

.badge {
    background-color: #EEF2FF;
    color: var(--primary);
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: bold;
}

.messages-container {
    min-height: 150px;
}

.empty-inbox {
    text-align: center;
    padding: 35px 0;
    color: var(--text-muted);
}

.empty-inbox i {
    font-size: 2.5rem;
    margin-bottom: 10px;
    opacity: 0.4;
}

.message-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px;
    border-bottom: 1px solid var(--border-color);
    cursor: pointer;
    border-radius: 6px;
    transition: background 0.2s;
}

.message-item:hover {
    background-color: #F9FAFB;
}

.message-sender {
    font-weight: bold;
    font-size: 0.95rem;
}

.message-subject {
    color: var(--text-muted);
    font-size: 0.88rem;
    margin-top: 3px;
}

/* Modals */
.modal {
    display: none;
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background-color: rgba(0,0,0,0.5);
    justify-content: center;
    align-items: center;
    z-index: 1000;
    padding: 20px;
}

.modal-content {
    background-color: white;
    width: 100%;
    max-width: 600px;
    border-radius: var(--radius);
    padding: 25px;
    max-height: 80vh;
    overflow-y: auto;
    position: relative;
}

.close-btn {
    position: absolute;
    top: 15px; left: 20px;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-muted);
}

.text-page h2 {
    margin-bottom: 12px;
    color: var(--primary);
}

.text-page p, .text-page ul {
    line-height: 1.6;
    color: var(--text-color);
    margin-bottom: 10px;
}

.footer {
    text-align: center;
    padding: 15px 0;
    background-color: var(--card-bg);
    border-top: 1px solid var(--border-color);
    font-size: 0.85rem;
    color: var(--text-muted);
}