:root {
    --bg-color: #050505;
    --text-color: #ffffff;
    --text-secondary: #9aa0a6;
    --accent-color: #8ab4f8;
    --card-bg: rgba(255, 255, 255, 0.03);
    --card-border: rgba(255, 255, 255, 0.08);
    --card-hover-bg: rgba(255, 255, 255, 0.06);
    --card-hover-border: rgba(255, 255, 255, 0.15);
    --font-primary: 'Inter', system-ui, -apple-system, sans-serif;
    --gradient-primary: linear-gradient(135deg, #8ab4f8 0%, #c58af9 100%);
    --blob-1: #4285f4;
    --blob-2: #9c27b0;
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: var(--font-primary);
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
}

/* Dynamic Background */
body::before,
body::after {
    content: '';
    position: absolute;
    width: 60vw;
    height: 60vw;
    border-radius: 50%;
    filter: blur(120px);
    opacity: 0.15;
    z-index: -1;
    animation: float 20s infinite alternate ease-in-out;
}

body::before {
    background: var(--blob-1);
    top: -20%;
    left: -20%;
}

body::after {
    background: var(--blob-2);
    bottom: -20%;
    right: -20%;
    animation-delay: -10s;
}

@keyframes float {
    0% {
        transform: translate(0, 0) scale(1);
    }

    100% {
        transform: translate(10%, 10%) scale(1.1);
    }
}

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.2s ease;
}

/* Header */
.header {
    padding: 24px 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.logo {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-color);
    letter-spacing: -0.01em;
    display: flex;
    align-items: center;
    gap: 8px;
}

/* Main Content */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 80px 20px;
    text-align: center;
    position: relative;
    z-index: 1;
}

/* Hero Section */
.hero {
    margin-bottom: 80px;
    max-width: 800px;
}

.hero-title {
    font-size: clamp(3rem, 8vw, 5rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 24px;
    letter-spacing: -0.03em;
    animation: fadeSlideUp 0.8s ease-out;
}

.hero-title .highlight {
    background: linear-gradient(90deg, #8ab4f8, #c58af9, #8ab4f8);
    background-size: 200% auto;
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    display: block;
    animation: shine 4s linear infinite;
}

@keyframes shine {
    to {
        background-position: 200% center;
    }
}

.hero-subtitle {
    font-size: clamp(1.1rem, 2vw, 1.35rem);
    color: var(--text-secondary);
    font-weight: 400;
    max-width: 600px;
    margin: 0 auto;
    animation: fadeSlideUp 0.8s ease-out 0.2s backwards;
}

/* Tools Grid */
.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
    width: 100%;
    max-width: 900px;
    padding: 0 20px;
}

.tool-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 24px;
    padding: 40px;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    text-align: left;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    position: relative;
    overflow: hidden;
    /* Spotlight Effect */
    background: radial-gradient(600px circle at var(--mouse-x, 0) var(--mouse-y, 0),
            rgba(255, 255, 255, 0.06),
            transparent 40%), var(--card-bg);

    animation: fadeSlideUp 0.8s ease-out 0.4s backwards;
}

/* Form Elements */
input,
select,
textarea {
    width: 100%;
    padding: 12px 16px;
    margin: 8px 0 24px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--card-border);
    border-radius: 8px;
    color: var(--text-color);
    font-family: var(--font-primary);
    font-size: 1rem;
    transition: all 0.3s ease;
}

/* Fix for select options text color on Windows */
select option {
    background-color: #202124;
    /* Dark background */
    color: #ffffff;
    /* White text */
}

input:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--accent-color);
    background: rgba(255, 255, 255, 0.1);
}

/* API Params Row Layout */
.param-row {
    display: flex;
    gap: 12px;
    align-items: center;
    margin-bottom: 12px;
}

.param-row input {
    margin: 0;
    width: auto;
    /* Reset width */
    flex: 1;
    min-width: 0;
    /* Prevent overflow */
}

.param-row .remove-btn {
    width: 40px;
    padding: 0;
    height: 48px;
    /* Match input height roughly */
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 59, 48, 0.2);
    color: #ff3b30;
    font-size: 1.5rem;
    line-height: 1;
}

.param-row .remove-btn:hover {
    background: rgba(255, 59, 48, 0.4);
    transform: none;
}

button {
    background: var(--gradient-primary);
    color: white;
    border: none;
    padding: 12px 24px;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s ease, opacity 0.2s ease;
}

button:hover {
    transform: translateY(-2px);
    opacity: 0.9;
}

label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-secondary);
    font-weight: 500;
}

/* SMTP Form Layout - Reverted to Stacked */
.form-group {
    margin-bottom: 20px;
}


/* Staggered animation */
.tool-card:nth-child(2) {
    animation-delay: 0.5s;
}

.tool-card:nth-child(3) {
    animation-delay: 0.6s;
}

.tool-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    border-radius: 24px;
    padding: 1px;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.1), rgba(255, 255, 255, 0));
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    pointer-events: none;
}

.tool-card:hover {
    background: var(--card-hover-bg);
    border-color: var(--card-hover-border);
    transform: translateY(-8px);
    box-shadow: 0 20px 40px -10px rgba(0, 0, 0, 0.3);
}

.card-icon {
    font-size: 2.5rem;
    margin-bottom: 20px;
    filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.2));
}

.card-content h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-color);
}

.card-content p {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Footer */
.footer {
    padding: 40px 20px;
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.875rem;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    margin-top: auto;
}

.footer a {
    color: var(--accent-color);
    position: relative;
}

.footer a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 1px;
    background: currentColor;
    transition: width 0.3s ease;
}

.footer a:hover::after {
    width: 100%;
}

/* Animations */
@keyframes fadeSlideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Mobile Responsive */
@media (max-width: 600px) {
    .header {
        padding: 20px;
    }

    .hero-title {
        font-size: 3rem;
    }

    .tools-grid {
        grid-template-columns: 1fr;
    }

    .tool-card {
        padding: 30px;
    }
}