:root {
    --bg-color: #000000;
    --card-bg: rgba(255, 255, 255, 0.03);
    --text-primary: #ffffff;
    --text-secondary: #888888;
    --accent: #00FF88;
    --border: rgba(255, 255, 255, 0.1);
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Outfit', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

/* Layout */
#app {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    min-height: 100vh;
}

header {
    margin-bottom: 60px;
    padding: 20px 0;
    border-bottom: 1px solid var(--border);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 600;
    letter-spacing: 2px;
}

.logo span {
    color: var(--accent);
}

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

/* Components */
.card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 40px;
    margin-bottom: 30px;
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow);
}

h1 {
    font-size: 2.5rem;
    font-weight: 300;
    margin-bottom: 10px;
}

p {
    color: var(--text-secondary);
    margin-bottom: 30px;
}

.form-group {
    margin-bottom: 25px;
}

label {
    display: block;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 8px;
    color: var(--text-secondary);
}

input {
    width: 100%;
    background: transparent;
    border: none;
    border-bottom: 1px solid var(--border);
    padding: 12px 0;
    color: var(--text-primary);
    font-size: 1.1rem;
    font-family: inherit;
    transition: var(--transition);
}

input:focus {
    outline: none;
    border-bottom-color: var(--accent);
}

.auth-buttons {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
    border: 1px solid var(--border);
    padding: 12px 20px;
    border-radius: 8px;
    cursor: pointer;
    text-align: left;
    transition: var(--transition);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--accent);
}

.btn-primary {
    background: var(--accent);
    color: #000;
    border: none;
    padding: 15px 40px;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 30px;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 4px 15px rgba(0, 255, 136, 0.2);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 255, 136, 0.4);
}

.btn-icon {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-primary);
    padding: 10px;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition);
}

.btn-icon:hover {
    background: var(--border);
}

/* Dashboard */
.dashboard-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 40px;
}

.calendar-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 20px;
}

.day-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 20px;
    transition: var(--transition);
    cursor: pointer;
}

.day-card:hover {
    border-color: var(--accent);
    transform: scale(1.02);
}

/* Utils */
.hidden {
    display: none !important;
}

.fade-in {
    animation: fadeIn 0.8s ease-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Loading Overlay */
.overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.loader {
    width: 48px;
    height: 48px;
    border: 3px solid var(--accent);
    border-bottom-color: transparent;
    border-radius: 50%;
    display: inline-block;
    animation: rotation 1s linear infinite;
    margin-bottom: 20px;
}

@keyframes rotation {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}