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

:root {
    --primary-bg: #0a0e27;
    --secondary-bg: #0f1629;
    --card-bg: #1a1f3a;
    --accent-blue: #00d4ff;
    --accent-purple: #7c3aed;
    --accent-pink: #ec4899;
    --accent-orange: #f97316;
    --accent-green: #10b981;
    --accent-gold: #ffd700;
    --text-primary: #e0e0ff;
    --text-secondary: #a8b2d1;
    --text-muted: #8892b0;
    --border-color: #1e2749;
    --gradient-1: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
    --shadow-glow: 0 0 20px rgba(0, 212, 255, 0.3)
}

html {
    scroll-behavior: smooth
}

body {
    font-family: 'Rajdhani', sans-serif;
    background: linear-gradient(135deg, var(--primary-bg) 0%, #1a0e3a 50%, var(--primary-bg) 100%);
    background-size: 400% 400%;
    animation: gradientShift 15s ease infinite;
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden
}

@keyframes gradientShift {

    0%,
    100% {
        background-position: 0% 50%
    }

    50% {
        background-position: 100% 50%
    }
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 20% 50%, rgb(124 58 237 / .15) 0%, transparent 50%), radial-gradient(circle at 80% 80%, rgb(0 212 255 / .15) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0
}

.navbar {
    background: rgb(15 22 41 / .95);
    backdrop-filter: blur(10px);
    border-bottom: 2px solid rgb(0 212 255 / .3);
    padding: 1.5rem 2rem;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-glow)
}

.logo {
    font-size: 1.8rem;
    font-weight: 900;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: #fff0;
    text-decoration: none
}

.hero {
    text-align: center;
    padding: 4rem 2rem;
    position: relative;
    z-index: 1
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 900;
    background: linear-gradient(135deg, var(--accent-purple), var(--accent-pink), var(--accent-orange));
    -webkit-background-clip: text;
    -webkit-text-fill-color: #fff0;
    margin-bottom: 1rem
}

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--text-secondary);
    margin-bottom: 1rem
}

.hero-description {
    max-width: 900px;
    margin: 0 auto;
    font-size: 1rem;
    color: var(--text-muted);
    background: rgb(124 58 237 / .1);
    padding: 2rem;
    border-radius: 12px;
    border: 1px solid var(--border-color)
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 3rem 2rem;
    position: relative;
    z-index: 1
}

.calc-card {
    background: var(--card-bg);
    border: 2px solid var(--border-color);
    border-radius: 16px;
    padding: 2.5rem
}

.calc-card:hover {
    border-color: var(--accent-blue);
    box-shadow: var(--shadow-glow)
}

.calc-title {
    font-size: 2.2rem;
    font-weight: 900;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: #fff0;
    margin-bottom: 2rem;
    display: flex;
    align-items: center;
    gap: 1rem
}

.input-group {
    margin-bottom: 2rem
}

.input-label {
    display: block;
    margin-bottom: .7rem;
    color: var(--accent-blue);
    font-weight: 700;
    font-size: 1rem
}

.search-container {
    position: relative
}

.search-input {
    width: 100%;
    padding: 1rem 1rem 1rem 2.8rem;
    background: rgb(0 212 255 / .05);
    border: 2px solid var(--border-color);
    border-radius: 10px;
    color: var(--text-primary);
    font-family: 'Rajdhani', sans-serif;
    font-size: 1rem;
    transition: all 0.3s
}

.search-input:focus {
    outline: none;
    border-color: var(--accent-blue);
    background: rgb(0 212 255 / .15);
    box-shadow: 0 0 15px rgb(0 212 255 / .4)
}

.select-field {
    width: 100%;
    padding: 1rem;
    background: rgb(0 212 255 / .05);
    border: 2px solid var(--border-color);
    border-radius: 10px;
    color: var(--text-primary);
    font-family: 'Rajdhani', sans-serif;
    font-size: 1rem;
    transition: all 0.3s;
    cursor: pointer;
    appearance: none;
    padding-right: 2.5rem;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2300d4ff' stroke-width='2'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right .8rem center;
    background-size: 1.5em 1.5em
}

.select-field:focus {
    outline: none;
    border-color: var(--accent-blue);
    background: rgb(0 212 255 / .15);
    box-shadow: 0 0 15px rgb(0 212 255 / .4)
}

.select-field option {
    background: var(--primary-bg);
    color: var(--text-primary)
}

.search-icon {
    position: absolute;
    left: .8rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--accent-blue)
}

.dropdown-list {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    max-height: 300px;
    overflow-y: auto;
    background: var(--card-bg);
    border: 2px solid var(--accent-blue);
    border-top: none;
    border-radius: 0 0 10px 10px;
    z-index: 100;
    display: none;
    box-shadow: var(--shadow-glow)
}

.dropdown-list.show {
    display: block
}

.dropdown-item {
    padding: .8rem 1rem;
    cursor: pointer;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border-color);
    transition: all 0.2s
}

.dropdown-item:hover {
    background: rgb(0 212 255 / .1);
    color: var(--accent-blue);
    padding-left: 1.5rem
}

.select-field {
    cursor: pointer;
    appearance: none;
    padding-right: 2.5rem;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2300d4ff' stroke-width='2'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right .8rem center;
    background-size: 1.5em 1.5em
}

.select-field option {
    background: var(--primary-bg);
    color: var(--text-primary)
}

.calc-button {
    width: 100%;
    padding: 1.2rem;
    background: var(--gradient-1);
    color: #fff;
    border: none;
    border-radius: 10px;
    font-size: 1.1rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s;
    font-family: 'Rajdhani', sans-serif;
    text-transform: uppercase;
    letter-spacing: 1px
}

.calc-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 0 25px rgb(0 212 255 / .6)
}

.result-container {
    background: linear-gradient(135deg, rgb(0 212 255 / .1), rgb(124 58 237 / .1));
    border: 2px solid var(--accent-blue);
    border-radius: 12px;
    padding: 2.5rem;
    margin-top: 2.5rem;
    display: none
}

.result-container.show {
    display: block;
    animation: slideDown 0.4s ease
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-20px)
    }

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

.result-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.5rem
}

.result-item {
    background: var(--card-bg);
    padding: 1.8rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    text-align: center
}

.result-item:hover {
    border-color: var(--accent-blue);
    transform: translateY(-5px)
}

.result-label {
    color: var(--text-muted);
    font-size: .9rem;
    margin-bottom: .8rem;
    text-transform: uppercase;
    font-weight: 700
}

.result-value {
    font-size: 2rem;
    font-weight: 900;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: #fff0;
    word-break: break-all
}

.result-unit {
    color: var(--text-secondary);
    font-size: .95rem;
    margin-top: .5rem
}

.info-box {
    background: rgb(236 72 153 / .1);
    border-left: 4px solid var(--accent-pink);
    padding: 1.5rem;
    border-radius: 8px;
    margin-top: 1.5rem
}

.info-title {
    color: var(--accent-pink);
    font-weight: 700;
    margin-bottom: .7rem
}

.info-text {
    color: var(--text-secondary);
    line-height: 1.7
}

.footer {
    background: rgb(15 22 41 / .95);
    border-top: 2px solid var(--border-color);
    padding: 3rem 2rem;
    text-align: center;
    margin-top: 4rem
}

.scroll-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 50px;
    height: 50px;
    background: var(--gradient-1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s;
    z-index: 999
}

.scroll-top.visible {
    opacity: 1;
    visibility: visible
}

@media (max-width:768px) {
    .hero-title {
        font-size: 2.5rem
    }

    .result-grid {
        grid-template-columns: 1fr
    }
}
/* ========================================
   PREMIUM NAVBAR STYLES - FIXED ALIGNMENT
   ======================================== */

.navbar-premium {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: linear-gradient(135deg, rgb(15 22 41 / .98) 0%, rgb(10 14 39 / .98) 100%);
    backdrop-filter: blur(20px);
    border-bottom: 2px solid transparent;
    border-image: linear-gradient(90deg, var(--accent-purple), var(--accent-blue), var(--accent-pink)) 1;
    box-shadow: 0 20px 60px rgb(0 212 255 / .2), inset 0 1px 0 rgb(255 255 255 / .1);
    transition: all 0.3s ease;
}

.navbar-glow {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--accent-blue), transparent);
    box-shadow: 0 0 20px var(--accent-blue);
}

.navbar-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0.8rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
    z-index: 10;
    gap: 2rem;
}

/* ======== LOGO - SMALLER ======== */
.logo-premium {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    font-size: 1.2rem;
    font-weight: 900;
    position: relative;
    padding: 0.4rem 0.8rem;
    border-radius: 8px;
    background: linear-gradient(135deg, rgb(124 58 237 / .2), rgb(0 212 255 / .2));
    border: 1px solid rgb(0 212 255 / .3);
    transition: all 0.3s ease;
    white-space: nowrap;
    flex-shrink: 0;
}

.logo-premium:hover {
    background: linear-gradient(135deg, rgb(124 58 237 / .3), rgb(0 212 255 / .3));
    border-color: var(--accent-pink);
    transform: scale(1.05);
    box-shadow: 0 0 30px rgb(236 72 153 / .5);
}

.logo-icon {
    font-size: 1.4rem;
}

.logo-text {
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple), var(--accent-pink));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-size: 1.1rem;
}

.logo-badge {
    font-size: 0.6rem;
    padding: 0.2rem 0.4rem;
    background: linear-gradient(135deg, var(--accent-pink), var(--accent-orange));
    color: white;
    border-radius: 12px;
    font-weight: 700;
}

/* ======== NAV MENU - BETTER ALIGNMENT ======== */
.nav-menu-container {
    flex: 1;
    display: flex;
    justify-content: center;
}

.nav-links-premium {
    display: flex;
    list-style: none;
    gap: 0.3rem;
    margin: 0;
    padding: 0;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
}

.nav-item {
    position: relative;
}

.nav-link {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    padding: 0.6rem 0.9rem;
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 600;
    border-radius: 6px;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    white-space: nowrap;
    font-size: 0.85rem;
    border: 1px solid transparent;
}

.nav-link::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgb(0 212 255 / .2), rgb(124 58 237 / .2));
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: -1;
}

.nav-link:hover::before {
    opacity: 1;
}

.nav-link:hover {
    color: var(--accent-blue);
    text-shadow: 0 0 10px rgb(0 212 255 / .6);
    transform: translateY(-2px);
    border-color: var(--accent-blue);
}

.nav-link.active {
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
    color: white;
    box-shadow: 0 8px 20px rgb(0 212 255 / .4);
    text-shadow: 0 0 10px rgba(0, 0, 0, 0.3);
    border-color: transparent;
}

.nav-badge {
    font-size: 0.55rem;
    padding: 0.15rem 0.35rem;
    background: rgb(236 72 153 / .8);
    color: white;
    border-radius: 10px;
    font-weight: 700;
}

.nav-link i {
    font-size: 0.95rem;
}

/* ======== RIGHT SIDE - COMPACT ======== */
.nav-right {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 0.6rem;
    flex-shrink: 0;
}

.nav-icon-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.3rem;
    padding: 0.6rem 1rem;
    background: linear-gradient(135deg, rgb(0 212 255 / .2), rgb(124 58 237 / .2));
    border: 2px solid var(--accent-blue);
    border-radius: 6px;
    color: var(--accent-blue);
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s ease;
    font-size: 0.8rem;
    white-space: nowrap;
    min-height: 38px;
}

.nav-icon-btn:hover {
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
    color: white;
    border-color: var(--accent-pink);
    box-shadow: 0 8px 20px rgb(0 212 255 / .4);
    transform: translateY(-2px);
}

.nav-icon-btn i {
    font-size: 1rem;
}

.game-mode-btn.active {
    background: linear-gradient(135deg, var(--accent-pink), var(--accent-orange)) !important;
    border-color: var(--accent-orange) !important;
    color: white !important;
    box-shadow: 0 8px 20px rgb(236 72 153 / .5) !important;
}

/* ======== HAMBURGER MENU ======== */
.hamburger-menu {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    z-index: 100;
    padding: 0.5rem;
}

.hamburger-menu span {
    width: 22px;
    height: 2.5px;
    background: var(--accent-blue);
    border-radius: 2px;
    transition: all 0.3s ease;
}

.hamburger-menu:hover span {
    background: var(--accent-pink);
}

/* ======== BOTTOM BORDER ======== */
.navbar-border {
    position: absolute;
    bottom: 0;
    left: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--accent-blue), var(--accent-purple), transparent);
    width: 100%;
}

/* ======== TABLET RESPONSIVE (768px) ======== */
@media (max-width: 1024px) {
    .navbar-container {
        gap: 1rem;
        padding: 0.8rem 1.5rem;
    }
    
    .nav-link {
        padding: 0.5rem 0.7rem;
        font-size: 0.75rem;
    }
    
    .nav-icon-btn {
        padding: 0.5rem 0.8rem;
        font-size: 0.7rem;
    }
    
    .logo-premium {
        font-size: 1rem;
    }
    
    .logo-text {
        font-size: 0.9rem;
    }
}

/* ======== MOBILE RESPONSIVE (768px and below) ======== */
@media (max-width: 768px) {
    .navbar-container {
        padding: 0.7rem 1rem;
        gap: 0.8rem;
    }
    
    .hamburger-menu {
        display: flex;
    }
    
    .nav-menu-container {
        position: fixed;
        top: 58px;
        left: 0;
        right: 0;
        background: linear-gradient(135deg, rgb(15 22 41 / .99), rgb(10 14 39 / .99));
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease;
        z-index: 999;
        flex: none;
    }
    
    .nav-menu-container.active {
        max-height: 450px;
        overflow-y: auto;
    }
    
    .nav-links-premium {
        flex-direction: column;
        gap: 0;
        padding: 0.5rem 0;
        width: 100%;
    }
    
    .nav-link {
        width: 100%;
        justify-content: flex-start;
        padding: 0.8rem 1.5rem;
        border-radius: 0;
        border: none;
        border-bottom: 1px solid var(--border-color);
        font-size: 0.9rem;
    }
    
    .nav-link:hover {
        padding-left: 2rem;
    }
    
    .logo-premium {
        font-size: 0.95rem;
        padding: 0.3rem 0.6rem;
        gap: 0.3rem;
    }
    
    .logo-text {
        font-size: 0.9rem;
    }
    
    .logo-icon {
        font-size: 1.1rem;
    }
    
    .logo-badge {
        font-size: 0.5rem;
        padding: 0.15rem 0.3rem;
    }
    
    .nav-right {
        gap: 0.4rem;
    }
    
    .nav-icon-btn {
        padding: 0.5rem 0.7rem;
        font-size: 0.7rem;
        min-height: auto;
    }
    
    .nav-icon-btn span {
        display: none;
    }
    
    .search-toggle {
        display: none;
    }
}

/* ======== SMALL MOBILE (480px and below) ======== */
@media (max-width: 480px) {
    .navbar-container {
        padding: 0.6rem 0.8rem;
    }
    
    .logo-premium {
        font-size: 0.85rem;
        padding: 0.25rem 0.5rem;
    }
    
    .logo-badge {
        display: none;
    }
    
    .nav-right {
        gap: 0.3rem;
    }
    
    .nav-icon-btn {
        padding: 0.4rem 0.6rem;
        font-size: 0.6rem;
        border-width: 1.5px;
    }
}
/* ================================================
   MOBILE-RESPONSIVE CSS - PERFECT ON ALL DEVICES
   ================================================ */

/* BASE SETUP - Mobile First */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* RESPONSIVE IMAGES */
img {
  max-width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}

/* RESPONSIVE CONTAINER */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
}

/* FLEXIBLE GRID */
.row {
  display: flex;
  flex-wrap: wrap;
  margin: 0 -0.5rem;
}

.col {
  flex: 1 1 100%;
  padding: 0 0.5rem;
}

/* RESPONSIVE NAVBAR */
nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  padding: 1rem;
  position: sticky;
  top: 0;
  z-index: 1000;
}

.nav-menu {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  list-style: none;
}

.nav-link {
  padding: 0.5rem 1rem;
  text-decoration: none;
  white-space: nowrap;
  font-size: 0.9rem;
}

/* RESPONSIVE CARDS */
.card {
  width: 100%;
  padding: 1rem;
  margin-bottom: 1rem;
  border-radius: 8px;
}

/* RESPONSIVE BUTTONS */
button, .btn {
  padding: 0.75rem 1.5rem;
  font-size: 1rem;
  border-radius: 6px;
  width: 100%;
  max-width: 300px;
  touch-action: manipulation;
}

/* RESPONSIVE TEXT */
h1 { font-size: clamp(1.75rem, 5vw, 2.5rem); }
h2 { font-size: clamp(1.5rem, 4vw, 2rem); }
h3 { font-size: clamp(1.25rem, 3vw, 1.75rem); }
p { font-size: clamp(0.9rem, 2vw, 1rem); }

/* TOUCH-FRIENDLY */
a, button, input {
  min-height: 44px;
  min-width: 44px;
}

/* FIX FOR ALL SCREEN SIZES - NAVBAR RESPONSIVE */
@media screen and (min-width: 1025px) and (max-width: 1350px) {
.navbar-container{padding: 0.7rem 1rem !important;}
.logo-icon{font-size: 1.6rem !important;}
.logo-text{font-size: 1.1rem !important;letter-spacing: 0 !important;}
.logo-badge{display: none !important;}
.nav-links-premium{gap: 0.2rem !important;}
.nav-link{padding: 0.5rem 0.65rem !important;font-size: 0.75rem !important;}
.nav-link i{font-size: 0.85rem !important;margin-right: 0.25rem !important;}
.nav-link span{font-size: 0.75rem !important;}
}

@media screen and (min-width: 769px) and (max-width: 1024px) {
.navbar-container{padding: 0.8rem 1rem !important;}
.logo-text{font-size: 1.15rem !important;letter-spacing: 0 !important;}
.logo-badge{display: none !important;}
.nav-links-premium{gap: 0.15rem !important;}
.nav-link{padding: 0.45rem 0.6rem !important;font-size: 0.7rem !important;}
.nav-link i{font-size: 0.8rem !important;}
.nav-link span{font-size: 0.7rem !important;}
}

@media screen and (max-width: 768px) {
.logo-badge{display: none !important;}
.hamburger-menu{display: flex !important;}
}