:root {
    --primary: #0066ff;
    --primary-dark: #0052cc;
    --primary-glow: rgba(0, 102, 255, 0.3);
    --secondary: #00e5ff;
    --bg-main: #0f172a;
    --bg-card: #1e293b;
    --bg-card-light: #334155;
    --sidebar: #1e293b;
    --text-main: #ffffff;
    --text-muted: #cbd5e1; /* Daha açık bir gri, okunabilirlik için */
    --border-color: #334155;
}

body {
    font-family: 'Inter', sans-serif;
    background: var(--bg-main);
    color: var(--text-main);
    margin: 0;
    display: flex;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}

/* Sidebar Update */
.sidebar {
    background: var(--sidebar);
    width: 260px;
    padding: 2rem 1.25rem;
    display: flex;
    flex-direction: column;
    border-right: 1px solid var(--border-color);
    flex-shrink: 0;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    margin-bottom: 2.5rem;
    padding-left: 0.75rem;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 0.875rem;
    padding: 0.75rem 1rem;
    border-radius: 0.75rem;
    color: var(--text-muted);
    transition: all 0.2s;
    cursor: pointer;
    margin-bottom: 0.25rem;
    font-size: 0.9375rem;
    font-weight: 500;
}

.nav-item:hover {
    background: rgba(255, 255, 255, 0.05);
    color: #ffffff;
}

.nav-item.active {
    background: var(--primary);
    color: #ffffff;
}

.nav-item i {
    width: 1.25rem;
    height: 1.25rem;
}

/* Main Content */
.main-content {
    flex: 1;
    padding: 2rem;
    overflow-y: auto;
}

.glass-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 1rem;
    padding: 1.5rem;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

.view-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.view-header h2 {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0;
}

.user-profile {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 0.5rem 1rem;
    border-radius: 2rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.user-avatar {
    width: 32px;
    height: 32px;
    background: var(--primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.875rem;
    color: white;
}

.user-email {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-main);
}

/* Dashboard Stats */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.stat-label {
    color: var(--text-muted);
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
    display: block;
}

.stat-value {
    font-size: 2.25rem;
    font-weight: 700;
    color: #ffffff;
    line-height: 1.2;
}

.announcement-card {
    background: rgba(255, 255, 255, 0.03);
    padding: 1.25rem;
    border-radius: 0.75rem;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.announcement-card p {
    color: #ffffff;
    line-height: 1.6;
}

.badge-status {
    background: rgba(0, 229, 255, 0.1);
    color: var(--secondary);
    padding: 0.25rem 0.75rem;
    border-radius: 2rem;
    font-size: 0.75rem;
    font-weight: 600;
}

/* SMS Form */
.sms-form {
    max-width: 600px;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--text-muted);
}

/* Forms */
.form-input, .form-textarea {
    background: #0f172a;
    border: 1px solid var(--border-color);
    color: #ffffff;
    border-radius: 0.75rem;
    padding: 0.75rem 1rem;
    width: 100%;
    box-sizing: border-box;
    font-size: 0.9375rem;
}

.form-input:focus, .form-textarea:focus {
    border-color: var(--primary);
    outline: none;
    box-shadow: 0 0 0 3px var(--primary-glow);
}

.btn {
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: all 0.2s;
}

.btn-primary {
    background: var(--primary);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 0.75rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    box-shadow: 0 4px 6px -1px var(--primary-glow);
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: 0 10px 15px -3px var(--primary-glow);
}

/* Toast Notification */
.toast-container {
    position: fixed;
    top: 2rem;
    right: 2rem;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.toast {
    background: white;
    padding: 1rem 1.5rem;
    border-radius: 1rem;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    min-width: 300px;
    transform: translateX(120%);
    transition: transform 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    border-left: 4px solid var(--primary);
}

.toast.show {
    transform: translateX(0);
}

.toast-success { border-left-color: #10b981; }
.toast-error { border-left-color: #ef4444; }
.toast-info { border-left-color: var(--primary); }

.toast-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
}

.toast-content {
    flex: 1;
}

.toast-title {
    font-weight: 700;
    font-size: 0.875rem;
    margin-bottom: 0.125rem;
}

.toast-message {
    font-size: 0.8125rem;
    color: var(--text-muted);
}

/* Character Counter */
.char-counter {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-align: right;
    margin-top: 0.25rem;
}

.char-counter span.warning {
    color: #f59e0b;
}

/* Login Page Overlay */
#login-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background: rgba(15, 23, 42, 0.95);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.login-card {
    width: 400px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 2.5rem;
    border-radius: 1rem;
    text-align: center;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}