:root {
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --primary-accent: #764ba2;
    --secondary-accent: #f093fb;
    --surface: #ffffff;
    --bg-soft: #f8f9ff;
    --text-main: #2d2d3a;
    --text-muted: #6c757d;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 8px 30px rgba(118, 75, 162, 0.12);
    --shadow-lg: 0 20px 50px rgba(118, 75, 162, 0.18);
    --radius-sm: 0.5rem;
    --radius-md: 0.875rem;
    --radius-lg: 1.25rem;
}

html {
    font-size: 14px;
}

@media (min-width: 768px) {
    html {
        font-size: 16px;
    }
}

html,
body {
    min-height: 100vh;
    color: var(--text-main);
}

body {
    background: var(--bg-soft);
    padding-top: 72px; /* reserve space for fixed navbar */
    font-family: "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

a {
    color: var(--primary-accent);
    text-decoration: none;
    transition: color 0.15s ease-in-out;
}

a:hover {
    color: #5a387c;
}

/* Navbar */
.app-navbar {
    background: var(--primary-gradient);
    border-bottom: none;
    box-shadow: var(--shadow-md);
    min-height: 72px;
}

.app-navbar .navbar-brand,
.app-navbar .nav-link {
    color: #fff !important;
    font-weight: 500;
}

.app-navbar .navbar-brand {
    font-size: 1.35rem;
    letter-spacing: -0.02em;
}

.app-navbar .nav-link {
    border-radius: var(--radius-sm);
    padding: 0.45rem 0.85rem;
    transition: background 0.15s ease-in-out;
}

.app-navbar .nav-link:hover,
.app-navbar .nav-link:focus {
    background: rgba(255, 255, 255, 0.15);
}

.app-navbar .navbar-toggler {
    border-color: rgba(255, 255, 255, 0.35);
}

.app-navbar .navbar-toggler-icon {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%28255, 255, 255, 0.9%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

.brand-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: var(--radius-sm);
    background: rgba(255, 255, 255, 0.2);
    color: #fff;
}

/* Navbar auth state */
.user-avatar {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    color: #fff;
}

.nav-auth-btn {
    border-radius: var(--radius-md);
    padding: 0.4rem 1rem;
    font-weight: 500;
}

.app-navbar .dropdown-menu {
    border-radius: var(--radius-md);
    border: none;
    box-shadow: var(--shadow-lg);
}

/* Buttons */
.btn-primary {
    background: var(--primary-gradient);
    border: none;
    border-radius: var(--radius-md);
    padding: 0.6rem 1.4rem;
    font-weight: 600;
    box-shadow: var(--shadow-sm);
    transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.btn-primary:hover,
.btn-primary:focus {
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
    background: linear-gradient(135deg, #5a6fd6 0%, #643f8c 100%);
}

.btn-outline-light {
    border-radius: var(--radius-md);
    font-weight: 500;
}

/* Focus */
.btn:focus,
.btn:active:focus,
.btn-link.nav-link:focus,
.form-control:focus,
.form-check-input:focus {
    box-shadow: 0 0 0 0.15rem rgba(118, 75, 162, 0.25);
    border-color: var(--primary-accent);
}

/* Forms */
.form-control {
    border-radius: var(--radius-md);
    border: 1px solid #d8dce6;
    padding: 0.65rem 1rem;
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.form-control:focus {
    background: #fff;
}

.form-label {
    font-weight: 600;
    color: var(--text-main);
    margin-bottom: 0.4rem;
}

.form-floating > .form-control {
    min-height: calc(3.5rem + 2px);
    line-height: 1.25;
}

/* Auth page background */
.auth-bg {
    position: relative;
    min-height: calc(100vh - 72px);
    background: var(--bg-soft);
    overflow: hidden;
    display: flex;
    align-items: center;
}

.auth-shape {
    position: absolute;
    border-radius: 50%;
    opacity: 0.35;
    filter: blur(60px);
    z-index: 0;
}

.auth-shape.shape-1 {
    width: 500px;
    height: 500px;
    background: var(--secondary-accent);
    top: -120px;
    right: -120px;
    animation: float 8s ease-in-out infinite;
}

.auth-shape.shape-2 {
    width: 400px;
    height: 400px;
    background: #a18cd1;
    bottom: -80px;
    left: -80px;
    animation: float 10s ease-in-out infinite reverse;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(30px);
    }
}

.z-1 {
    z-index: 1;
}

/* Login card */
.login-card {
    background: var(--surface);
    border: 1px solid rgba(118, 75, 162, 0.08);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}

.login-card-header {
    background: var(--primary-gradient);
    padding: 2.25rem 1.5rem 1.75rem;
    position: relative;
}

.login-card-header::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 18px;
    background: var(--surface);
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    transform: translateY(50%);
}

.login-card .brand-icon {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    position: relative;
    z-index: 1;
}

.login-card .card-body {
    padding: 2.25rem;
    position: relative;
    z-index: 1;
}

@media (max-width: 576px) {
    .login-card .card-body {
        padding: 1.5rem;
    }

    .login-card-header {
        padding: 1.75rem 1rem 1.25rem;
    }
}

.success-circle {
    width: 72px;
    height: 72px;
    border-radius: 50%;
    background: #d1fae5;
    color: #059669;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

/* Footer */
.app-footer {
    background: var(--primary-gradient);
    color: #fff;
    font-size: 0.875rem;
}

.app-footer .footer-link {
    color: rgba(255, 255, 255, 0.85);
    transition: color 0.15s ease-in-out;
}

.app-footer .footer-link:hover {
    color: #fff;
}

/* Utilities */
.min-vh-80 {
    min-height: 80vh;
}

.text-gradient {
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.form-floating > .form-control-plaintext::placeholder,
.form-floating > .form-control::placeholder {
    color: var(--bs-secondary-color);
    text-align: end;
}

.form-floating > .form-control-plaintext:focus::placeholder,
.form-floating > .form-control:focus::placeholder {
    text-align: start;
}