/* =========================================
   ORACLE REDWOOD DESIGN SYSTEM - BASE
   ========================================= */

:root {
    /* Oracle Brand Colors */
    oracle-red: #C74634;
    oracle-red-hover: #A83829;
    oracle-red-light: rgba(199, 70, 52, 0.1);
    
    /* Neutrals & Backgrounds */
    text-primary: #161513;
    text-secondary: #5F5B57;
    text-muted: #8A8580;
    bg-primary: #ffffff;
    bg-secondary: #f1efed;
    bg-tertiary: #e8e6e3;
    
    /* Borders & Shadows (Oracle Signature) */
    border-color: rgba(63, 58, 54, 0.2);
    border-light: rgba(63, 58, 54, 0.1);
    shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.04);
    shadow-md: 0 4px 8px rgba(0, 0, 0, 0.08);
    shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.12);
    shadow-hover: 0 12px 24px rgba(0, 0, 0, 0.16);
    
    /* Radii */
    radius-sm: 8px;
    radius-md: 12px;
    radius-lg: 16px;
    
    /* Transitions */
    transition-fast: 200ms cubic-bezier(0.4, 0, 0.2, 1);
    transition-smooth: 300ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* Reset & Base */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

.body {
    font-family: 'Oracle Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    color: var(text-primary);
    background-color: var(bg-secondary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    color: var(text-primary);
}

.a {
    color: var(oracle-red);
    text-decoration: none;
    transition: color var(transition-fast);
}

.a:hover {
    color: var(oracle-red-hover);
}

/* Typography */
.text-muted { color: var(text-secondary); }
.text-red { color: var(oracle-red); }

/* Buttons (Oracle Style) */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    border: 1px solid transparent;
    border-radius: var(radius-sm);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(transition-fast);
    text-decoration: none;
    line-height: 1.5;
}

.btn:active {
    transform: scale(0.98);
}

.btn-primary {
    background-color: var(oracle-red);
    color: #ffffff;
    border-color: var(oracle-red);
}

.btn-primary:hover {
    background-color: var(oracle-red-hover);
    border-color: var(oracle-red-hover);
    box-shadow: var(shadow-md);
    color: #ffffff;
}

.btn-secondary {
    background-color: var(bg-primary);
    color: var(text-primary);
    border-color: var(border-color);
}

.btn-secondary:hover {
    background-color: var(bg-secondary);
    border-color: var(text-secondary);
}

.btn-large {
    padding: 14px 28px;
    font-size: 16px;
    border-radius: var(radius-md);
}

.btn-block {
    width: 100%;
}

/* Forms */
.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    margin-bottom: 8px;
    font-size: 14px;
    font-weight: 600;
    color: var(text-secondary);
}

.form-input {
    width: 100%;
    padding: 12px 16px;
    background-color: var(bg-primary);
    border: 1px solid var(border-color);
    border-radius: var(radius-sm);
    font-size: 14px;
    color: var(text-primary);
    transition: all var(transition-fast);
}

.form-input:focus {
    outline: none;
    border-color: var(oracle-red);
    box-shadow: 0 0 0 3px var(oracle-red-light);
}

/* Cards */
.card {
    background: var(bg-primary);
    border: 1px solid var(border-light);
    border-radius: var(radius-md);
    box-shadow: var(shadow-sm);
    padding: 24px;
    transition: transform var(transition-smooth), box-shadow var(transition-smooth);
}

.card-hover:hover {
    transform: translateY(-4px);
    box-shadow: var(shadow-hover);
}

/* Alerts */
.alert {
    padding: 12px 16px;
    border-radius: var(radius-sm);
    margin-bottom: 20px;
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.alert-error {
    background-color: #fef2f2;
    color: #991b1b;
    border: 1px solid #fecaca;
}

.alert-success {
    background-color: #f0fdf4;
    color: #166534;
    border: 1px solid #bbf7d0;
}

/* Utilities */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.flex { display: flex; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: 8px; }
.gap-4 { gap: 16px; }